The figure is made up of 3 squares of side 5 cm, 10 cm and 11 cm. Find
- the perimeter of the figure.
- the area of the figure.
(a)
Perimeter of the figure
= 4 x 11 + 2 x 10 + 2 x 5 + 2 x (10 - 5)
= 4 x 11 + 2 x 10 + 2 x 5 + 2 x 5
= 44 + 20 + 10 + 10
= 84 cm
(b)
Area of the figure
= 11 x 11 + 5 x 5 + 10 x 10
= 121 + 25 + 100
= 246 cm
2 Answer(s): (a) 84 cm; (b) 246 cm
2