Circles

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

• Diameter
• Radius

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

• Diameter

• Radius

What is the radius of this circle?

• 12cm
• 6cm
• 24cm
• 3cm

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

• 34.6 mm

• 30 mm

• 25.3 mm

• 34.54 cm

What is the radius?

• 18
• 72
• 38
• 14

The radius is....

• a line that crosses through the center and touches each edge 
• the center point of a circle 
• a line from the center point to the edge of the circle
• an element in science

A bicycle tire has a diameter of 27 inches. What is the radius?

• 27pi
• 13.5
• 81
• 25pi

The distance around a circle; much like the perimeter of a rectangle.

• perimeter
• diameter
• circumference
• radius

What is the area of a circle?

• The distance around a circle.

• The space inside the circle.

• The length of the straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

• The line from the center of a circle to any point on its edge.