Circle: Radius and Diameter

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

What is the distance around a circle?

• Circumference
• Area
• Diameter
• Radius

Tags

CCSS.HSG.GMD.A.1

The diameter of a circle is:

• The measurement around the circle.

• The distance from an edge of a circle to another edge.

• The distance from an edge of a circle to another edge through the center.

What is the diameter?

• 8

• 16

• 10

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.

• The measurement around the circle

• The measurement from and edge of the circle to another edge through the center

Does this picture show the diameter or radius of a circle?

• Diameter
• Radius

Tags

CCSS.HSG.CO.A.1

What is the radius of a circle with a diameter of 45 miles?

• 22.5 miles

• 141.3 miles

• 90 miles

What is the radius?

• 18

• 72

• 38

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

• 40ft

• 80ft

• 20ft