PSLE A square, not drawn to scale, is made up of four triangles G, H, J and K. The area of G is
110 the area of the square while the area of H is
320 the area of the square.
- The total areas of G and H is 100 cm2. What is the length of each side of the square?
- What fraction of the square is Area of K?
(a)
Fraction of the square made up of Areas G and H
=
110 +
320=
220 +
320 =
520Areas G and H = 5 u
5 u = 100
1 u = 100 ÷ 5 = 20
Area of the square
= 20 u
= 20 x 20
= 400 cm
2 Length of the square
= √400
= 20 cm
(b)
Areas of G and K = Areas of H and J =
12 of the area of the square
Fraction of the square that is Area K
=
12 -
110=
510 -
110=
410
= 25
Answer(s): (a) 20 cm; (b) 25