Lesson 9.2: Identifying Shapes in Pictures and Shadows
Spot geometric shapes in everyday objects and silhouettes.
⏱️ Reading Time: 15 mins
• ❓ 50 Interactive Practice Questions
#ShapesInPictures #Shadows #IdentifyingShapes
Identifying Shapes in Pictures and Shadows
Artists and nature use basic geometric shapes to build everything we see. When sunlight shines on objects, their shadows reveal their 2D outlines!
Circle (0 sides)
Triangle (3 sides)
Square (4 equal)
Rectangle
2D Shapes: Circle, Triangle, Square, and Rectangle.
1. Decomposing Pictures into Shapes
A picture of a house is made of a triangle roof, a square wall, a rectangle door, and small square windows. A picture of an ice cream is a triangle cone with a circle scoop on top!
Activity: Draw a robot using only squares, circles, and rectangles!
2. Shadows and Silhouettes
When you shine a flashlight behind a ball, its shadow on the wall is a flat circle! A cardboard shoe box casts a rectangular shadow.
Shadow Fact: 3D solid objects cast flat 2D shadows!
💡 Key Learning Takeaways
- Complex illustrations are made of simple 2D shapes.
- Shadows cast by 3D objects are flat 2D shapes.
- Spotting shapes improves visual reasoning.
🎯 Key Learning Takeaways
Visual decomposition and shadows.
📄 Printable Worksheets (10 Available)
Download ready-to-print PDFs for offline student practice with separate parent/teacher answer keys.
WL-G2-C09-W10
A4 • 15 Qs
2D Shapes — Worksheet 10
Curriculum Excellence & Final Review
WL-G2-C09-W09
A4 • 15 Qs
2D Shapes — Worksheet 9
Mastery Assessment & Progress Check
WL-G2-C09-W08
A4 • 15 Qs
2D Shapes — Worksheet 8
Mixed Review & Reinforcement
WL-G2-C09-W07
A4 • 15 Qs
2D Shapes — Worksheet 7
Everyday Applications & Story Maths
WL-G2-C09-W06
A4 • 15 Qs
2D Shapes — Worksheet 6
Critical Thinking & Deep Understanding
WL-G2-C09-W05
A4 • 15 Qs
2D Shapes — Worksheet 5
Speed Challenge & Quick Check
WL-G2-C09-W04
A4 • 15 Qs
2D Shapes — Worksheet 4
Problem Solving & Real-Life Stories
WL-G2-C09-W03
A4 • 15 Qs
2D Shapes — Worksheet 3
Hands-on Visual Activity & Matching
WL-G2-C09-W02
A4 • 15 Qs
2D Shapes — Worksheet 2
Essential Practice & Skill Builder
WL-G2-C09-W01
A4 • 15 Qs
2D Shapes — Worksheet 1
Foundational Concepts & Visual Exploration
✍️ Lesson Practice Questions (50 Questions)
Solve these real-world challenges online, test your understanding, and reveal instant step-by-step explanations.
1
Multiple Choice
Hard
1 Mark
What is the difference between (54 + 10) and (42 + 10)?
A
22
B
12
C
54
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
12
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (54 + 10) - (42 + 10) = 54 - 42 = 12.
2
Multiple Choice
Hard
1 Mark
A secret number plus 12 equals 54. If you double the secret number, what is the result?
A
42
B
108
C
44
D
84
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
84
Step-by-Step Explanation:
The secret number is 42. Doubling it gives 42 × 2 = 84.
3
Multiple Choice
Hard
1 Mark
If 42 + 12 = 54, what is 12 + 42?
A
54
B
42
C
55
D
12
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
54
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 54 greater than 42?
A
Because {v1} is an even number
B
Because {tot} has a bigger first digit
C
Because 54 includes 42 plus an additional 12 items
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 54 includes 42 plus an additional 12 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
5
Multiple Choice
Medium
1 Mark
Sam evaluated 54 - 12 and wrote 66. What was Sam's mistake?
A
He divided the numbers
B
He added instead of subtracting
C
He forgot the units place
D
He multiplied by 2
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
6
Multiple Choice
Medium
1 Mark
A student claimed that 42 + 12 = 64 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition is only for 1-digit numbers
B
Addition means combining only the given numbers without adding extra amounts
C
The student subtracted instead
D
The answer is 0
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
42 + 12 equals exactly 54.
7
Multiple Choice
Medium
1 Mark
Complete the pattern: 42, 47, 52, [ ? ].
A
56
B
54
C
57
D
62
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
57
Step-by-Step Explanation:
The pattern increases by 5. 52 + 5 = 57.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 42 + [ ? ] = 54.
A
11
B
12
C
13
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
12
Step-by-Step Explanation:
Missing value is 12 because 42 + 12 = 54.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 42 yellow marigolds and 12 purple petunias. How many flowers are blooming in total?
A
54 flowers
B
42 flowers
C
59 flowers
D
12 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
54 flowers
Step-by-Step Explanation:
42 + 12 = 54 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 54 new graphic novels. Students checked out 12 novels on Monday. How many new novels are still on the shelf?
A
54 novels
B
42 novels
C
43 novels
D
12 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
42 novels
Step-by-Step Explanation:
54 - 12 = 42 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 42 apple pies in the morning and 12 cherry pies in the afternoon. How many pies did the baker pack in all?
A
56 pies
B
54 pies
C
42 pies
D
52 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
54 pies
Step-by-Step Explanation:
42 + 12 = 54 pies in total.
12
Multiple Choice
Easy
1 Mark
What number is 10 more than 42?
A
32
B
52
C
62
D
43
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
52
Step-by-Step Explanation:
42 + 10 = 52.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 54 [ ? ] 49?
A
=
B
>
C
≈
D
<
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
54 is greater than 49.
14
Multiple Choice
Easy
1 Mark
Calculate: 54 - 12 = ?
A
41
B
42
C
43
D
12
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
42
Step-by-Step Explanation:
54 - 12 = 42.
15
Multiple Choice
Easy
1 Mark
In Chapter '2D Shapes', calculate: 42 + 12 = ?
A
54
B
55
C
64
D
53
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
54
Step-by-Step Explanation:
42 + 12 = 54.
16
Multiple Choice
Hard
1 Mark
What is the difference between (69 + 10) and (35 + 10)?
A
35
B
69
C
34
D
44
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
34
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (69 + 10) - (35 + 10) = 69 - 35 = 34.
17
Multiple Choice
Hard
1 Mark
A secret number plus 34 equals 69. If you double the secret number, what is the result?
A
70
B
37
C
138
D
35
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
70
Step-by-Step Explanation:
The secret number is 35. Doubling it gives 35 × 2 = 70.
18
Multiple Choice
Hard
1 Mark
If 35 + 34 = 69, what is 34 + 35?
A
70
B
69
C
34
D
35
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
69
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
19
Multiple Choice
Hard
1 Mark
Why is 69 greater than 35?
A
Because 69 includes 35 plus an additional 34 items
B
Because {tot} has a bigger first digit
C
Because {v1} is an even number
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 69 includes 35 plus an additional 34 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
20
Multiple Choice
Medium
1 Mark
Sam evaluated 69 - 34 and wrote 103. What was Sam's mistake?
A
He divided the numbers
B
He added instead of subtracting
C
He multiplied by 2
D
He forgot the units place
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
21
Multiple Choice
Medium
1 Mark
A student claimed that 35 + 34 = 79 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition means combining only the given numbers without adding extra amounts
B
The answer is 0
C
The student subtracted instead
D
Addition is only for 1-digit numbers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
35 + 34 equals exactly 69.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 35, 40, 45, [ ? ].
A
55
B
50
C
49
D
47
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
50
Step-by-Step Explanation:
The pattern increases by 5. 45 + 5 = 50.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 35 + [ ? ] = 69.
A
35
B
34
C
33
D
35
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
34
Step-by-Step Explanation:
Missing value is 34 because 35 + 34 = 69.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 35 yellow marigolds and 34 purple petunias. How many flowers are blooming in total?
A
69 flowers
B
35 flowers
C
74 flowers
D
34 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
69 flowers
Step-by-Step Explanation:
35 + 34 = 69 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 69 new graphic novels. Students checked out 34 novels on Monday. How many new novels are still on the shelf?
A
36 novels
B
69 novels
C
35 novels
D
34 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
35 novels
Step-by-Step Explanation:
69 - 34 = 35 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 35 apple pies in the morning and 34 cherry pies in the afternoon. How many pies did the baker pack in all?
A
67 pies
B
71 pies
C
35 pies
D
69 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
69 pies
Step-by-Step Explanation:
35 + 34 = 69 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 35?
A
25
B
45
C
36
D
55
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
45
Step-by-Step Explanation:
35 + 10 = 45.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 69 [ ? ] 64?
A
≈
B
<
C
>
D
=
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
69 is greater than 64.
29
Multiple Choice
Easy
1 Mark
Calculate: 69 - 34 = ?
A
36
B
34
C
34
D
35
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
35
Step-by-Step Explanation:
69 - 34 = 35.
30
Multiple Choice
Easy
1 Mark
In Chapter '2D Shapes', calculate: 35 + 34 = ?
A
79
B
70
C
69
D
68
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
69
Step-by-Step Explanation:
35 + 34 = 69.
31
Multiple Choice
Hard
1 Mark
What is the difference between (59 + 10) and (28 + 10)?
A
41
B
31
C
28
D
59
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
31
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (59 + 10) - (28 + 10) = 59 - 28 = 31.
32
Multiple Choice
Hard
1 Mark
A secret number plus 31 equals 59. If you double the secret number, what is the result?
A
56
B
30
C
118
D
28
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
56
Step-by-Step Explanation:
The secret number is 28. Doubling it gives 28 × 2 = 56.
33
Multiple Choice
Hard
1 Mark
If 28 + 31 = 59, what is 31 + 28?
A
28
B
31
C
59
D
60
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
59
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 59 greater than 28?
A
Because 59 includes 28 plus an additional 31 items
B
Numbers ending in 0 are always smaller
C
Because {tot} has a bigger first digit
D
Because {v1} is an even number
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 59 includes 28 plus an additional 31 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
35
Multiple Choice
Medium
1 Mark
Sam evaluated 59 - 31 and wrote 90. What was Sam's mistake?
A
He multiplied by 2
B
He added instead of subtracting
C
He divided the numbers
D
He forgot the units place
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
36
Multiple Choice
Medium
1 Mark
A student claimed that 28 + 31 = 69 because 'we must add 10 to every answer'. Why is this student wrong?
A
The answer is 0
B
The student subtracted instead
C
Addition means combining only the given numbers without adding extra amounts
D
Addition is only for 1-digit numbers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
28 + 31 equals exactly 59.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 28, 33, 38, [ ? ].
A
48
B
42
C
43
D
40
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
43
Step-by-Step Explanation:
The pattern increases by 5. 38 + 5 = 43.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 28 + [ ? ] = 59.
A
28
B
30
C
32
D
31
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
31
Step-by-Step Explanation:
Missing value is 31 because 28 + 31 = 59.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 28 yellow marigolds and 31 purple petunias. How many flowers are blooming in total?
A
64 flowers
B
59 flowers
C
28 flowers
D
31 flowers
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
59 flowers
Step-by-Step Explanation:
28 + 31 = 59 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 59 new graphic novels. Students checked out 31 novels on Monday. How many new novels are still on the shelf?
A
28 novels
B
31 novels
C
29 novels
D
59 novels
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
28 novels
Step-by-Step Explanation:
59 - 31 = 28 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 28 apple pies in the morning and 31 cherry pies in the afternoon. How many pies did the baker pack in all?
A
61 pies
B
28 pies
C
59 pies
D
57 pies
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
59 pies
Step-by-Step Explanation:
28 + 31 = 59 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 28?
A
18
B
48
C
29
D
38
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
38
Step-by-Step Explanation:
28 + 10 = 38.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 59 [ ? ] 54?
A
<
B
≈
C
>
D
=
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
>
Step-by-Step Explanation:
59 is greater than 54.
44
Multiple Choice
Easy
1 Mark
Calculate: 59 - 31 = ?
A
28
B
31
C
27
D
29
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
28
Step-by-Step Explanation:
59 - 31 = 28.
45
Multiple Choice
Easy
1 Mark
In Chapter '2D Shapes', calculate: 28 + 31 = ?
A
58
B
69
C
60
D
59
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
59
Step-by-Step Explanation:
28 + 31 = 59.
46
Multiple Choice
Hard
1 Mark
What is the difference between (49 + 10) and (21 + 10)?
A
49
B
21
C
38
D
28
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
28
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (49 + 10) - (21 + 10) = 49 - 21 = 28.
47
Multiple Choice
Hard
1 Mark
A secret number plus 28 equals 49. If you double the secret number, what is the result?
A
21
B
98
C
23
D
42
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
42
Step-by-Step Explanation:
The secret number is 21. Doubling it gives 21 × 2 = 42.
48
Multiple Choice
Hard
1 Mark
If 21 + 28 = 49, what is 28 + 21?
A
49
B
21
C
50
D
28
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
49
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 49 greater than 21?
A
Because {tot} has a bigger first digit
B
Because 49 includes 21 plus an additional 28 items
C
Numbers ending in 0 are always smaller
D
Because {v1} is an even number
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
Because 49 includes 21 plus an additional 28 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
50
Multiple Choice
Medium
1 Mark
Sam evaluated 49 - 28 and wrote 77. What was Sam's mistake?
A
He multiplied by 2
B
He divided the numbers
C
He added instead of subtracting
D
He forgot the units place
💡 Click to View Correct Answer & Explanation ▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.