PSLE A square, not drawn to scale, is made up of four triangles L, M, N and P. The area of L is
110 the area of the square while the area of M is
15 the area of the square.
- The total areas of L and M is 480 cm2. What is the length of each side of the square?
- What fraction of the square is Area of P?
(a)
Fraction of the square made up of Areas L and M
=
110 +
15=
110 +
210 =
310Areas L and M = 3 u
3 u = 480
1 u = 480 ÷ 3 = 160
Area of the square
= 10 u
= 10 x 160
= 1600 cm
2 Length of the square
= √1600
= 40 cm
(b)
Areas of L and P = Areas of M and N =
12 of the area of the square
Fraction of the square that is Area P
=
12 -
110=
510 -
110=
410
= 25
Answer(s): (a) 40 cm; (b) 25