PSLE A square, not drawn to scale, is made up of four triangles B, C, D and E. The area of B is
110 the area of the square while the area of C is
15 the area of the square.
- The total areas of B and C is 4320 cm2. What is the length of each side of the square?
- What fraction of the square is Area of E?
(a)
Fraction of the square made up of Areas B and C
=
110 +
15=
110 +
210 =
310Areas B and C = 3 u
3 u = 4320
1 u = 4320 ÷ 3 = 1440
Area of the square
= 10 u
= 10 x 1440
= 14400 cm
2 Length of the square
= √14400
= 120 cm
(b)
Areas of B and E = Areas of C and D =
12 of the area of the square
Fraction of the square that is Area E
=
12 -
110=
510 -
110=
410
= 25
Answer(s): (a) 120 cm; (b) 25