Radius and Diameter Formula

Find Circumference.

• 87.92 cm

• 43.96 cm

• 21.98 cm

• 3.14 cm

Find Circumference. Leave answer in terms of pi (π)

• 36π

• 12π

• 6π

• 24π

In words, describe this formula

• The area of a circle is equal to pi times the radius squared

• The circumference of a circle is equal to the pi times the diameter.

• The circumference of a circle is equal to pi times the radius squared

• The area of a circle is equal to pi times the diameter

What is line AD called?

• Area

• Circumference

• Radius

• Diameter

Find Circumference. Watch the units.

• 28.26 ft²

• 28.26 ft

• 28.26

• 56.52 ft

Find Circumference. Watch the units.

• 37.68 m²

• 37.68 m

• 18.84 m

• 18.84 m²

Find Circumference. Round to nearest hundredths

• 14.13 km

• 56.52 km

• 28.26 km

• 63.59 km

What is line CB called?

• Circumference

• Diameter

• Radius

• Chord

The distance from any point on the outside of a circle to the center of the circle is called what?

• Diameter

• Circumference

• Area

• Radius

The distance across a circle through the center is called what?

• Area

• Diameter

• Circumference

• Radius