Circle Geometry

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
• A line perpendicular to the diameter of the circle

What is the diameter of a circle?

• A straight line that spans the distance from the center of a circle to the edge.

• The distance around the edge of the circle.

• A straight line that spans the distance from one edge of the circle through the center to the opposite edge.

• The space inside a circle

What is the radius?

• 18
• 72
• 38
• 14

What is the diameter?

• 8
• 16
• 10
• 4

What is the radius?

• 18
• 72
• 38
• 14

What is the radius of this circle?

• 12cm
• 6cm
• 24cm
• 3cm

What is the diameter of this circle?

• 3.5
• 3
• 5
• 7

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

• 20ft
• 5ft
• 31.4ft
• 62.8ft

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

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

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