Free Grade 3 Compound Shapes in Context Techniques Flashcards
Free Grade 3 flashcards for Compound Shapes in Context Techniques: 12 real questions with a full answer key and worked solutions. Perimeter is the distance around a shape; area is the space inside. Rectangle area = length × width; triangle = ½ × base × height; circle = πr².
Free
Foundation
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain compound shapes in context techniques
Explain compound shapes in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate compound shapes in context techniques
Calculate compound shapes in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare compound shapes in context techniques
Compare compound shapes in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify compound shapes in context techniques
Justify compound shapes in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Compound Shapes in Context Techniques works
Perimeter is the distance around a shape; area is the space inside. Rectangle area = length × width; triangle = ½ × base × height; circle = πr².
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.A rectangle is 3 cm by 2 cm. Find its perimeter and area.[1]
- 2.A rectangle is 8 cm by 8 cm. Find its perimeter and area.[1]
- 3.A rectangle is 2 cm by 4 cm. Find its perimeter and area.[1]
- 4.A rectangle is 5 cm by 7 cm. Find its perimeter and area.[1]
- 5.A triangle has base 30 cm and height 13 cm. Find its area.[2]
- 6.A triangle has base 30 cm and height 10 cm. Find its area.[2]
- 7.A triangle has base 30 cm and height 7 cm. Find its area.[2]
- 8.A triangle has base 30 cm and height 4 cm. Find its area.[2]
- 9.Find the area and circumference of a circle with radius 2 cm (to 1 d.p.).[3]
- 10.Find the area and circumference of a circle with radius 9 cm (to 1 d.p.).[3]
- 11.Find the area and circumference of a circle with radius 12 cm (to 1 d.p.).[3]
- 12.Find the area and circumference of a circle with radius 6 cm (to 1 d.p.).[3]
Show answers and working
1. Perimeter 10 cm, area 6 cm²
Perimeter = 3 + 2 + 3 + 2 = 10 cm. Area = 3 × 2 = 6 cm².
2. Perimeter 32 cm, area 64 cm²
Perimeter = 8 + 8 + 8 + 8 = 32 cm. Area = 8 × 8 = 64 cm².
3. Perimeter 12 cm, area 8 cm²
Perimeter = 2 + 4 + 2 + 4 = 12 cm. Area = 2 × 4 = 8 cm².
4. Perimeter 24 cm, area 35 cm²
Perimeter = 5 + 7 + 5 + 7 = 24 cm. Area = 5 × 7 = 35 cm².
5. 195 cm²
Area = ½ × base × height. ½ × 30 × 13 = 195 cm².
6. 150 cm²
Area = ½ × base × height. ½ × 30 × 10 = 150 cm².
7. 105 cm²
Area = ½ × base × height. ½ × 30 × 7 = 105 cm².
8. 60 cm²
Area = ½ × base × height. ½ × 30 × 4 = 60 cm².
9. Area 12.6 cm², circumference 12.6 cm
Area = πr² = π × 2² = 12.6 cm². Circumference = 2πr = 2 × π × 2 = 12.6 cm.
10. Area 254.5 cm², circumference 56.5 cm
Area = πr² = π × 9² = 254.5 cm². Circumference = 2πr = 2 × π × 9 = 56.5 cm.
11. Area 452.4 cm², circumference 75.4 cm
Area = πr² = π × 12² = 452.4 cm². Circumference = 2πr = 2 × π × 12 = 75.4 cm.
12. Area 113.1 cm², circumference 37.7 cm
Area = πr² = π × 6² = 113.1 cm². Circumference = 2πr = 2 × π × 6 = 37.7 cm.
Worked examples
A rectangle is 2 cm by 8 cm. Find its perimeter and area.
- Perimeter = 2 + 8 + 2 + 8 = 20 cm.
- Area = 2 × 8 = 16 cm².
- Answer: Perimeter 20 cm, area 16 cm²
A triangle has base 24 cm and height 4 cm. Find its area.
- Area = ½ × base × height.
- ½ × 24 × 4 = 48 cm².
- Answer: 48 cm²
Find the area and circumference of a circle with radius 7 cm (to 1 d.p.).
- Area = πr² = π × 7² = 153.9 cm².
- Circumference = 2πr = 2 × π × 7 = 44 cm.
- Answer: Area 153.9 cm², circumference 44 cm
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Mixes up area and perimeter.
Correction: Perimeter is a fence (around), area is grass (inside).
Uses the slanted side as the height of a triangle.
Correction: Height must be at right angles to the base.
Teacher tips
- · Draw shapes on squared paper and count squares first.
Parent tips
- · Measure a room and work out how much carpet you'd need.
Real-life applications
- · Carpeting a room, fencing a garden.
Assessment objectives
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Frequently asked
- Is this Grade 3 Compound Shapes in Context Techniques flashcards really free?
- Yes. Every flashcards on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Compound Shapes in Context Essentials, Working with Compound Shapes. Each one has its own free lesson, worksheet and quiz.
- How is the flashcards sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Compound Shapes in Context Techniques?
- Move on to Compound Shapes in Context Word Problems, Compound Shapes in Context Common Errors, Introducing Compound Shapes, Working with Compound Shapes, which build directly on this idea.
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