PSLE A square, not drawn to scale, is made up of four triangles D, E, F and G. The area of D is
19 the area of the square while the area of E is
16 the area of the square.
- The total areas of D and E is 2250 cm2. What is the length of each side of the square?
- What fraction of the square that is Area G?
(a)
Fraction of the square made up of Areas D and E
=
19 +
16=
218 +
318 =
5185 u = 2250
1 u = 2250 ÷ 5 = 450
Area of the square
= 18 u
= 18 x 450
= 8100 cm
2 Length of the square
= √8100
= 90 cm
(b)
Areas of D and G = Areas of E and F =
12 of the area of the square
Fraction of the square that is Area G
=
12 -
19=
918 -
218
= 718
Answer(s): (a) 90 cm; (b) 718