The figure is made up of a big quadrant RTV a small quadrant RSW and a square SUWR. The radius of the big quadrant RTV is 39 cm. The area of the big quadrant is twice the area of the small quadrant RSW. Using the calculator value of π, find the area of the shaded parts, correct to 1 decimal place.
Area of the big quadrant
= ¹₄ x π x 39 x 39 
≈ 380.25π cm²

Area of the big square
= ¹₂ x 39 x 39
= 760.5 cm²

Area of the small quadrant
= 380.25π ÷ 2 
≈ 190.125π cm²

Area of the triangle RSW
= 760.5 ÷ 2 
= 380.25 cm²

Area of the shaded part
= (380.25π - 760.5) + (190.125π - 380.25)
= 380.25π + 190.125π  - 760.5 - 380.25
= 570.375π - 1140.75
≈ 651.1 cm² (Correct to 1 decimal place)

Answer(s): 651.1 cm²