Given the figure that is not drawn to scale, find
- its perimeter.
- its area.
(a)
Perimeter of the figure
= (4 x 18) + (4 x 4) + (4 x 5)
= 72 + 16 + 20
= 108 cm
(b)
Length of AB
= 18 - 5 - 5
= 8 cm
Length of CD
= 18 - 4 - 4
= 10 cm
Area of the figure
= (18 x 18) - (2 x (8 x 4)) - (2 x (10 x 5))
= 324 - 64 - 100
= 160 cm
2 Answer(s): (a) 108 cm; (b) 160 cm
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