The rectangular piece of wood shown in Figure 1 has a perimeter of 50 cm. Elyse 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
=
50 - 5 - 52 =
402 = 20 cm
(b)
Length of the shaded area
= 20 - 5
= 15 cm
Shaded area in Figure 2
= 15 x 15
= 225 cm
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Answer(s): (a) 20 cm; (b) 225 cm
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