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Find the perimeter and area of the following shapes.

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(i) Perimeter = (4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4) cm = 48 cm

Perimeter = 48 cm

Area of 5 squares of side 4 cm

Area of a square = (side × side) unit2

∴ A = 5 × (4 × 4) cm2 = 5 × 16 cm2 = 80 cm2
80 cm2

(ii) Perimeter = (4 + 5 + 4 + 5 + 4 + 5 + 4 + 5)cm = 36cm

Perimeter = 36 cm

Area of a square of side 3cm + Area of 4 right triangles

= (3 × 3) + [4 × 1/2 × 4 × 3] cm2 = (9 + 24) cm2 = 33 cm2

Area = 33 cm2

(iii) Perimeter = (50 + 12 + 13 + 40 + 10 + 10 + 10 + 5) cm = 150 cm

Perimeter = 150 cm

Area = Area of a rectangle + Area of a square + Area of a right triangle.

= (l × b) + (s × s) + (1/2 × b × h) cm2

= (50 × 5) + (10 × 10) + 1/2 × 12 × 5) cm2

= (250 + 100 + 30) cm2 = 380 cm2

Area = 380 cm2

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