Area of a Circle

A straight line from the center of a circle to the circumference is called the ____.

• Diameter

• Circumference

• Radius

• Area

A straight line segment that passes through the center of a circle and whose endpoints lie on the circumference of the circle is called the ____.

• Diameter

• Radius

• Circumference

• Area

What is the radius of a circle when the diameter is 70 m?

• 38 m

• 35 m

• 90 m

• 140 m

If a radius of a circle is 24 m, what is the diameter?

• 12 m

• 32 m

• 25 m

• 48 m

What is the radius?

• 8 mm

• 4 mm

• 16 mm

A circle has a diameter of 36 ft. What is the radius?

• 18

• 72

• 14

What is the diameter of a circle if the radius is 8 cm?

• 8 cm

• 16 cm

• 4 cm

Find the radius of a circle who's diameter is 40 ft.

• 40ft
• 80ft
• 20ft
• 45ft

The circumference of a circle is

• The measurement from an edge of a circle to another edge.
• The measurement around the circle
• The measurement from an edge of a circle to another edge going through the center
• The measurement from the center of the circle to an edge of the circle

The distance across the circle through the center is called the...

• radius
• diameter
• circumference
• area