The figure is made up of 3 squares of side 5 cm, 7 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 7 + 2 x 5 + 2 x (7 - 5)
= 4 x 12 + 2 x 7 + 2 x 5 + 2 x 2
= 48 + 14 + 10 + 4
= 76 cm
(b)
Area of the figure
= 12 x 12 + 5 x 5 + 7 x 7
= 144 + 25 + 49
= 218 cm
2 Answer(s): (a) 76 cm; (b) 218 cm
2