The figure is made up of 3 squares of side 5 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 5 + 2 x (8 - 5)
= 4 x 12 + 2 x 8 + 2 x 5 + 2 x 3
= 48 + 16 + 10 + 6
= 80 cm
(b)
Area of the figure
= 12 x 12 + 5 x 5 + 8 x 8
= 144 + 25 + 64
= 233 cm
2 Answer(s): (a) 80 cm; (b) 233 cm
2