Radius and diameter of a circle

If the radius of the circle is 3cm, what is the diameter?

• 1.5 cm

• 6cm

• 3 cm

• 2 cm

If the diameter of the circle is 48 cm, what is the radius?

• 24 cm

• 48 cm

• 12 cm

• 96 cm

The diameter of a circle is 20 inches. What is the circumference of the circle?

• 62.8 in

• 31.4 in

• 125.6 in

• 40 in

The radius of the circle is 14 mm. What is the circumference?

• 17.14 mm

• 87.92 mm

• 43.96 mm

• 21.98 mm

The diameter of a circle is 90 cm. What is the radius? What is the circumference?

• 45 cm, 180 cm

• 90 cm, 282.6 cm

• 180 cm, 565.2 cm

• 45 cm, 282.6 cm