PSLE A square, not drawn to scale, is made up of four triangles J, K, L and M. The area of J is
116 the area of the square while the area of K is
18 the area of the square.
- The total areas of J and K is 75 cm2. What is the length of each side of the square?
- What fraction of the square that is Area M?
(a)
Fraction of the square made up of Areas J and K
=
116 +
18=
116 +
216 =
3163 u = 75
1 u = 75 ÷ 3 = 25
Area of the square
= 16 u
= 16 x 25
= 400 cm
2 Length of the square
= √400
= 20 cm
(b)
Areas of J and M = Areas of K and L =
12 of the area of the square
Fraction of the square that is Area M
=
12 -
116=
816 -
116
= 716
Answer(s): (a) 20 cm; (b) 716