(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