The figure is made up of 4 identical rectangles, E, F, G and H. The perimeter of rectangle E is 90 cm.
- What is the breadth of rectangle F?
- Find the area of rectangle G.
(a)
Rectangles E, F, G and H are identical.
Breadth of Rectangle E = 1 u
Length of Rectangle F = 2 u
Perimeter of Rectangle E
= 1 u + 1 u + 2 u + 2 u
= 6 u
6 u = 90
1 u = 90 ÷ 6 = 15
Breadth of Rectangle F = 15 cm
(b)
Length of Rectangle G
= 2 u
= 2 x 15
= 30 cm
Area of Rectangle G
= 30 x 15
= 450 cm
2 Answer(s): (a) 15 cm; (b) 450 cm
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