AREA OF CIRCLES & COMPOSITE FIGURES

FIND THE AREA OF THE TRIANGLE.

• 2347.5 cm²

• 2640 cm²

• 4875 cm²

• 5280 cm²

The figure is made up of a square and a circle. The area of the square is 81 cm2 . Find the area of the circle. (Take π = 3.14.)

• 63.855 cm²

• 63.585 cm²

• 17.415 cm²

• 144.585 cm²

BCDJ and DEGH are rectangles.

CD = DE. Find the area of Triangle BJH.

• 93 cm²

• 104 cm²

• 78 cm²

• 39 cm²

The figure is made up of a circle, with centre A, and two identical right-angled triangles. The radius of the circle is 10 cm. Find the area of the shaded part of the figure. (Take π = 3.14.)

(a)  

4 identical circles, each of diameter 8 cm, were cut out from a large circular cardboard as shown. Find the area of the cardboard left. (Take π = 3.14.)

• 200.96 cm²

• 803.84 cm²

• 602.88 cm²

• 206.88 cm²

The figure is made up of two overlapping identical quarter circles. Find the area of the shaded part. Give your answer correct to 1 decimal place.

• 78.54 cm²

• 57.1 cm²

• 50 cm²

• 100 cm²

PQR is an isosceles triangle. Find <PRQ.

• 110°

• 90°

• 10°

• 75°

Find the perimeter of the quarter circle.

Take pi = 22/7.

• 58 cm

• 50 cm

• 52 cm

• 22 cm

The figure is made up of a semicircle with center O and a right-angled triangle ABO. Find the shaded area.

• 98 cm²

• 308 cm²

• 210 cm²

• 201 cm²

The figure is made up of a semicircle and a square of side 16 cm and a right-angled triangle. Find its area. Correct your answer to 1 decimal place.

{Take pi = 3.14}

• 40 cm²

• 420.5 cm²

• 450.2 cm²

• 420.48 cm²