The figure shows a rectangular piece of paper 31 cm by 5 cm which is coloured on one side. It is folded along the dotted line to form Figure 2.
- Find the area of the rectangular piece of paper.
- Find the total area of R, S and T in Figure 2.
(a)
Area of the rectangular piece of paper
= 31 x 5
= 155 cm
2 (b)
Areas of U and V
= 5 x 5
= 25 cm
2 Total area of R, S, and T
= 155 - 25
= 130 cm
2 Answer(s): (a) 155 cm
2; (b) 130 cm
2