The figure is made up of 4 identical rectangles, C, D, E and F. The perimeter of rectangle C is 54 cm.
- What is the breadth of rectangle D?
- Find the area of rectangle E.
(a)
Rectangles C, D, E and F are identical.
Breadth of Rectangle C = 1 u
Length of Rectangle D = 2 u
Perimeter of Rectangle C
= 1 u + 1 u + 2 u + 2 u
= 6 u
6 u = 54
1 u = 54 ÷ 6 = 9
Breadth of Rectangle D = 9 cm
(b)
Length of Rectangle E
= 2 u
= 2 x 9
= 18 cm
Area of Rectangle E
= 18 x 9
= 162 cm
2 Answer(s): (a) 9 cm; (b) 162 cm
2