Circles, Cylinders, Cones and Spheres Test

Unit Test #33

Select your answers to the following 10 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.





A circle has a radius of 9 cm.

What is its diameter?

A. 3 cm
B. 18 cm
C. 6 cm
D. 4.5 cm

Answer 1:





Which of the following can be used as approximations for pi?

B. 3.1
C. 3.14
D. all of the above

Answer 2:





If the diameter of a circle is 12 metres, what is the radius? A. 24 m
B. 6 m
C. 36 m
D. 6 cm

Answer 3:





What is the radius of the circle?

A. 3.75 cm
B. 28.5 cm
C. 4.75 cm
D. 19 cm

Answer 4:





What is the circumference of the circle above?

Use π = 3.1

Circumference = pi x diameter

A. 29.45 cm
B. 24.8 m
C. 32 m
D. 99.2 m

Answer 5:





What is the area of the circle above?

Use π= 3.1 and give answer to one decimal place.

Area = pi x radius x radius

A. 29.5 cm2
B. 58.9 cm2 
C. 69.9 cm2
D. 559.6 cm2

Answer 6:





Which of the following units could be used to measure the circumference of a circle? A. tonnes
B. kilometres
C. litres
D. hectares

Answer 7:





If the circumference of a circle is 24.8 cm, what is its diameter?

Circumference = pi x diameter

A. 2 cm
B. 4 cm
C. 8 cm
D. 16 cm

Answer 8:





What mathematical name best describes a tennis ball?

A. cylinder
B. cube
C. sphere
D. circle

Answer 9:





If the radius of a circle is doubled, how many times greater is its area? A. 4
B. 2
C. 16
D. 8

Answer 10: