The rectangular piece of wood shown in Figure 1 has a perimeter of 60 cm. Diana arranged 4 such rectangular pieces of wood to form a figure as shown in Figure 2.
- Find the length of the rectangular piece of wood.
- Find the shaded area in Figure 2.
(a)
Length of the rectangular piece of wood
=
60 - 5 - 52 =
502 = 25 cm
(b)
Length of the shaded area
= 25 - 5
= 20 cm
Shaded area in Figure 2
= 20 x 20
= 400 cm
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Answer(s): (a) 25 cm; (b) 400 cm
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