Figure ABCD is made up of eight identical rectangles. Each rectangle has a length of 18 cm.
- Find the perimeter of Figure ABCD.
- Find the area of Figure ABCD
(a)
Breadth of one rectangle = 1 u
Length of one length = 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Length of Figure ABCD = 6 u
Breadth of Figure ABCD = 4 u
Perimeter of Figure ABCD
= 6 u + 6 u + 4 u + 4 u
= 20 u
= 20 x 6
= 120 cm
(b)
Area of 1 rectangle
= 18 x 6
= 108 cm
2 Area of Figure ABCD
= 8 x 108
= 864 cm
2 Answer(s): (a) 120 cm; (b) 864 cm
2