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 = 36
1 u = 36 ÷ 4 = 9
3 breadth = 1 length of the small rectangle
= 3 x 9
= 27 cm
Perimeter of one small rectangle
= 27 + 9 + 27 + 9
= 72 cm
(b)
Length of the large rectangle
= 4 u
= 4 x 9
= 36 cm
Perimeter of whole figure
= 36 + 27 + 36 + 27
= 126 cm
Answer(s): (a) 72 cm; (b) 126 cm