PSLE A square, not drawn to scale, is made up of four triangles J, K, L and M. The area of J is
19 the area of the square while the area of K is
16 the area of the square.
- The total areas of J and K is 250 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
=
19 +
16=
218 +
318 =
5185 u = 250
1 u = 250 ÷ 5 = 50
Area of the square
= 18 u
= 18 x 50
= 900 cm
2 Length of the square
= √900
= 30 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 -
19=
918 -
218
= 718
Answer(s): (a) 30 cm; (b) 718