Circle Measurement

The radius of a circle with a diameter of 12 cm is 6 cm.

• True

• False

The area of a circle with a radius of 8 cm is 64π cm^2.

• True

• False

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

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches

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

• 20ft

• 5ft

• 31.4ft

• 62.8ft

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

Find the circumference of a circle with a radius of 12.5 mm .

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

What is the area of this circle?

• 1385.44

• 2142.12

• 5541.77

• 1289.12

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

• Radius

• Diameter

Find the measure of the missing angle in degrees.

Mathematical Equivalence

ON