PSLE A square, not drawn to scale, is made up of four triangles U, V, W and X. The area of U is
110 the area of the square while the area of V is
320 the area of the square.
- The total areas of U and V is 3600 cm2. What is the length of each side of the square?
- What fraction of the square is Area of X?
(a)
Fraction of the square made up of Areas U and V
=
110 +
320=
220 +
320 =
520Areas U and V = 5 u
5 u = 3600
1 u = 3600 ÷ 5 = 720
Area of the square
= 20 u
= 20 x 720
= 14400 cm
2 Length of the square
= √14400
= 120 cm
(b)
Areas of U and X = Areas of V and W =
12 of the area of the square
Fraction of the square that is Area X
=
12 -
110=
510 -
110=
410
= 25
Answer(s): (a) 120 cm; (b) 25