Lesson 15.3 Solving circle problems

Work out the circumference of a circle with diameter 6.8 cm. (1 d.p)

• 21.5 cm

• 21.4 cm

• 22.4 cm

• 22.6 cm

Work out the area of a circle with diameter 6.8 cm. (1 d.p)

• 36.3 cm²

• 35.3 cm²

• 32.4 cm²

• 35.4 cm²

Work out the area of a semicircle with radius 7m.

• 78.0 m²

• 76.0 m²

• 77.0 m²

• 79.0 m²

Work out the perimeter of a semicircle with radius 7m.

• 30.0 m

• 32.0 m

• 34.0 m

• 36.0 m

Work out the area of the circle with with radius = 4.25 m. (Use π button in your calculator) Round your answers correct to 3 significant figures.

• 57.6 m²

• 56.7 m²

• 56.8 m²

• 56.9 m²

Work out the area of the circle with with radius = 6 cm. (Use π button in your calculator) Round your answers correct to 3 significant figures.

• 112 cm²

• 113 cm²

• 114 cm²

• 115 cm²

Work out the shaded area of the compound shape. Give your answers correct to 3 s.f.

• 58.8 cm²

• 55.8 cm²

• 53.8 cm²

• 51.8 cm²

Work out the area of the circle with with diameter = 23 cm. (Use π button in your calculator) Round your answers correct to 3 significant figures.

• 412 cm²

• 413 cm²

• 415 cm²

• 417 cm²

Work out the area of the circle with with diameter = 4.8 m. (Use π button in your calculator) Round your answers correct to 3 significant figures.

• 18.2 cm²

• 18.3 cm²

• 18.5 cm²

• 18.1 cm²

Work out the shaded area of the compound shape. Give your answers correct to 3 s.f.

• 62.3 cm²

• 64.5 cm²

• 63.6 cm²

• 61.4 cm²