Area and Perimeter of Compound Shapes

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By DANA 8-K

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Area and Perimeter of Compound Shapes

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Objectives

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To help students understand and apply the concepts of area and perimeter of compound shapes through a fun and interactive game.

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Area = 3 × 4 = 12 cm²
Area = 8 × 2 = 16 cm²
Total Area = 12 cm² + 16 cm² = 28 cm²
Perimeter = Sum of all outer sides
Total Perimeter = 3 + 5 + 2 + 8 + 2 + 4 = 24 cm
Area = 28 cm² Perimeter = 24 cm

Shape 1: L-Shaped Compound Figure

Shape 2: U-Shaped Compound Figure

Shape 3: T-Shaped Compound Figure

Area = 12 × 5 = 60 cm²
Area = 3 × 7 = 21 cm²
Total Area = 60 cm² + 21 cm² = 81 cm²
Total Perimeter = 12 + 5 + 5 + 4.5 + 4.5 + 7 + 7 + 3 = 48 cm
Area = 81 cm²
Perimeter = 48 cm

Area = 12 × 8 = 96 cm²
Area = 4 × 4 = 16 cm²
Total Area = 96 - 16 = 80 cm²
Total Perimeter = 12 + 8 + 8 + 4 + 4 + 4 + 4 + 4 = 48 cm
Area = 80 cm² Perimeter = 48 cm

To verify your understanding of what I taught you, I'll ask you some minor questions.

Multiple Choice

What is the formula for the area of a rectangle?

• Length + Width

• (Length × Width) ÷ 2

• Length × Width

• Length × 2 + Width × 2

Fill in the Blanks

Multiple Choice

The End.

• Thnak You

• Thunk You

• Thank Yuo

• Thank You

Multiple Choice

What is the total area of this shape if each small rectangle’s area is 12 cm² and 24 cm²?

• 28 cm²

• 48 cm²

• 68 cm²

• 88 cm²

Multiple Choice

A playground has an irregular shape made of two rectangles. Why is it important to know its area?

• To buy enough grass or flooring

• To measure it's height

• To see how deep it is

• To find out how old it is

Multiple Choice

Estimate the area of this space if its length is 20m and width is 10m.

• 100 m²

• 300 m²

• 400 m²

• 200 m²

Multiple Choice

The End.

• Thnak you

• Thunk you

• Thank yuo

• Thank you