Semicircle and quarter circle

This quarter circle has a radius of 10 cm. How long is the total perimeter? Give your answer to one decimal place.

• 15.7

• 35.7cm

• 15.7cm

This semi-circle has a radius of 15 centimetres. What is the perimeter?

• 47.1 cm

• 77.1 cm

The diameter of this circle is 30 centimetres, in terms of Pi what is the area of this quarter circle?

• 56.85m

• 225cm

The radius of this circle is 4 centimetres, in terms of Pi what is the area of this quarter circle?

• 16cm

• 4cm

With a radius of 6 millimetres, what is the area of this semi-circle in terms of Pi?

• 9mm

• 18mm

• 10cm

• 25cm

• 5cm

• 6cm

• 16cm

• 4cm

• 8cm

With a radius of 20 cm, what is the perimeter of this semi-circle to 1dp?

• 40cm

• 50cm

• 102.8cm