Radius and Diameter

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Draw a circle with a radius of 2.4 cm. What is the diameter?

• 2.4 cm

• 4.8 cm

• 5.76 CM

A circle has a radius of 19.54 yards. What is the diameter?

• 19.54

• 39.08

• 20.07

• 19.70

What is radius?

• a straight line going from the center point of a circle to the outer edge

• Diameter is a straight line going from the outer edge of a circle to the other outer edge

• the line that goes complete around the outside of a circle

• radius is the area inside a circle

What is diameter?

• a straight line going from the center point of a circle to the outer edge

• a straight line going from the outer edge of a circle to the other outer edge

• a curved line that goes complete around the outside of a circle

• the area inside a circle

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

• 40ft

• 80ft

• 20ft

• 45ft

What is the diameter of this circle?

• 3.5

• 3

• 5

• 7

A circle has a diameter of 156 inches. What is the radius?

• 78

• 312

• 156

• 90

What is the diameter of the circle?

• 2 yd

• 4 yd

• 8 yd

• 16 yd

Is this a radius or diameter?

• Radius

• Diameter