Question

Find the area of the shapes below. Make sure to label your answers with units.

Answer 1

1# 13.3 Km

2# 57.4 Km

3# 45.5 Km

4# 24.36 Km

Answer 2

Explanation:

Area of shapes

a) Triangle

base = b = 7 km

altitude or height = h = 3.8 km

`\sf \boxed{\text{\bf Area of triangle =$(1)/(2)b*h$ }}`

`= (1)/(2)*7*3.8\\\\= 7 * 1.9\\\\= 13.3 \ km^2`

b) Rectangle:

length = l = 8.2 cm

width = w = 7 cm

`\sf \boxed{\text{\bf Area of rectangle = l*w}}`

= 8.2 * 7

= 57.4 cm²

c) Parallelogram

base = b = 9.1 km

height = h = 5 km

`\sf \boxed{\text{\bf Area of parallellogram =b*h}}`

= 9.1 * 5

= 45.5 km²

d) Trapezium

Parallel sides a = 8.9 m & b = 2.7 m

height = h = 4.2 m

`\sf \boxed{\text{\bf Area of trapezium =$((a +b)*h)/(2)$}}`

`\sf =((8.9+2.7)*4.2)/(2)\\\\=(11.6*4.2)/(2)\\\\= 5.8 * 4.2\\\\= 24.36 \ m^2`