The figure shows a rectangular piece of paper 25 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 H, J and K in Figure 2.
(a)
Area of the rectangular piece of paper
= 25 x 5
= 125 cm
2 (b)
Areas of L and M
= 5 x 5
= 25 cm
2 Total area of H, J, and K
= 125 - 25
= 100 cm
2 Answer(s): (a) 125 cm
2; (b) 100 cm
2