PSLE A square, not drawn to scale, is made up of four triangles S, T, U and V. The area of S is
110 the area of the square while the area of T is
15 the area of the square.
- The total areas of S and T is 1920 cm2. What is the length of each side of the square?
- What fraction of the square is Area of V?
(a)
Fraction of the square made up of Areas S and T
=
110 +
15=
110 +
210 =
310Areas S and T = 3 u
3 u = 1920
1 u = 1920 ÷ 3 = 640
Area of the square
= 10 u
= 10 x 640
= 6400 cm
2 Length of the square
= √6400
= 80 cm
(b)
Areas of S and V = Areas of T and U =
12 of the area of the square
Fraction of the square that is Area V
=
12 -
110=
510 -
110=
410
= 25
Answer(s): (a) 80 cm; (b) 25