Study the figure.
- Find the perimeter of one small rectangle.
- Find the perimeter of the whole figure.
(a)
Length = 3 u
Breadth = 1 u
4 u = 40
1 u = 40 ÷ 4 = 10
3 breadth = 1 length of the small rectangle
= 3 x 10
= 30 cm
Perimeter of one small rectangle
= 30 + 10 + 30 + 10
= 80 cm
(b)
Length of the large rectangle
= 4 u
= 4 x 10
= 40 cm
Perimeter of whole figure
= 40 + 30 + 40 + 30
= 140 cm
Answer(s): (a) 80 cm; (b) 140 cm
