The rectangular piece of wood shown in Figure 1 has a perimeter of 40 cm. Shannon 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
=
40 - 4 - 42 =
322 = 16 cm
(b)
Length of the shaded area
= 16 - 4
= 12 cm
Shaded area in Figure 2
= 12 x 12
= 144 cm
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Answer(s): (a) 16 cm; (b) 144 cm
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