Quiz on Circumference and Area of Circles

What is the diameter of this circle?

• 2 cm

• 8 cm

• 25.12 cm

• 50.24 cm

• 12.56 cm

• 8 cm

• 25.12 cm

• 50.24 cm

What is the radius of the button?

• 20 mm

• 80 mm

• 125.6 mm

• 1,256 mm

• 20 mm

• 62.8 mm

• 125.6 mm

• 1,256 mm

What is the diameter of the circle?

• 1.5 cm

• 6 cm

• 9 cm

• 18.84 cm

What is the circumference of the circle?
Remember:

 $C\ =\ \pi\times d$  

• 6 cm

• 18.84 cm

• 28.26 cm

• 9.42 cm

What is the area of the circle?
Remember:

 $A\ =\ r\times r\times\pi$  

•  $9.42\ cm^2$  

•  $18.84\ cm^2$  

•  $28.26\ cm$  

•  $7.065\ cm^2$  

True or False: The distance around a circle is its area.

• True

• False