The rectangular piece of wood shown in Figure 1 has a perimeter of 70 cm. Olivia 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
=
70 - 5 - 52 =
602 = 30 cm
(b)
Length of the shaded area
= 30 - 5
= 25 cm
Shaded area in Figure 2
= 25 x 25
= 625 cm
2
Answer(s): (a) 30 cm; (b) 625 cm
2