The figure is made up of 3 squares of side 3 cm, 8 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 8 + 2 x 3 + 2 x (8 - 3)
= 4 x 12 + 2 x 8 + 2 x 3 + 2 x 5
= 48 + 16 + 6 + 10
= 80 cm
(b)
Area of the figure
= 12 x 12 + 3 x 3 + 8 x 8
= 144 + 9 + 64
= 217 cm
2 Answer(s): (a) 80 cm; (b) 217 cm
2