Figure BCDE is made up of ten identical rectangles. Each rectangle has a length of 28 cm.
- Find the perimeter of Figure BCDE.
- Find the area of Figure BCDE
(a)
Breadth of one rectangle = 1 u
Length of one length = 4 u
4 u = 28
1 u = 28 ÷ 4 = 7
Length of Figure BCDE = 8 u
Breadth of Figure BCDE = 5 u
Perimeter of Figure BCDE
= 8 u + 8 u + 5 u + 5 u
= 26 u
= 26 x 7
= 182 cm
(b)
Area of 1 rectangle
= 28 x 7
= 196 cm
2 Area of Figure BCDE
= 10 x 196
= 1960 cm
2 Answer(s): (a) 182 cm; (b) 1960 cm
2