PSLE A square, not drawn to scale, is made up of four triangles F, G, H and J. The area of F is
19 the area of the square while the area of G is
16 the area of the square.
- The total areas of F and G is 4000 cm2. What is the length of each side of the square?
- What fraction of the square that is Area J?
(a)
Fraction of the square made up of Areas F and G
=
19 +
16=
218 +
318 =
5185 u = 4000
1 u = 4000 ÷ 5 = 800
Area of the square
= 18 u
= 18 x 800
= 14400 cm
2 Length of the square
= √14400
= 120 cm
(b)
Areas of F and J = Areas of G and H =
12 of the area of the square
Fraction of the square that is Area J
=
12 -
19=
918 -
218
= 718
Answer(s): (a) 120 cm; (b) 718