Question 13

VRXW → 84 cm

" The perimeter of triangle VRW is 2/3 of the perimeter of shaded part VRXW. "

▵ VRW → 2/3 of VRXW = 2/3 x 84 = 56

1 fin + 1WR = 56 2 fin + 2WR = 56 x 2 = 112 2 fin = 84

2WR = 112 - 84 = 28 1WR = 28 ÷ 2 = 14

area of shaded part → 2 x shaded triangle

shaded triangle → 1/2 x base x height = 1/2 x 14 x 14 = 98

area of shaded part → 2 x shaded triangle = 2 x 98 = 196 cm²