The figure shows a rectangular piece of paper 35 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 B, C and D in Figure 2.
(a)
Area of the rectangular piece of paper
= 35 x 5
= 175 cm
2 (b)
Areas of E and F
= 5 x 5
= 25 cm
2 Total area of B, C, and D
= 175 - 25
= 150 cm
2 Answer(s): (a) 175 cm
2; (b) 150 cm
2