The figure is made up of 3 squares of side 3 cm, 10 cm and 12 cm. Find
- the perimeter of the figure.
- the area of the figure.
(a)
Perimeter of the figure
= 4 x 12 + 2 x 10 + 2 x 3 + 2 x (10 - 3)
= 4 x 12 + 2 x 10 + 2 x 3 + 2 x 7
= 48 + 20 + 6 + 14
= 88 cm
(b)
Area of the figure
= 12 x 12 + 3 x 3 + 10 x 10
= 144 + 9 + 100
= 253 cm
2 Answer(s): (a) 88 cm; (b) 253 cm
2