Unit 4 Lesson 4 Circles Quiz

Match the formulas to the measurements indicated.

• To find the radius of the circle use:

• d÷2

• To find the circumference of a circle use:

• 2⋅r

• To find the area of a circle use:

• To find the diameter of a circle use:

Which one below does NOT relate to the circumference of a circle?

• The distance around the circle

• The space inside the circle

Select the 2 items below that represent area.

• The distance around a circle

• The space inside a circle

A line that goes from one side of the circle to the other and crosses the center point.  

• center

• diameter

• circle

• radius

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

• distance around a circle

What is the length of the diameter of the circle?

• 3 cm

• 1.5 cm

• 6 cm

• 9 cm

What is the radius of this circle?

• 18 in

• 36 in

• 9 in

• 8 in

12 inches in this circle represents its

• radius

• diameter

• center

• circumference

18 in on this circle represents..

• radius

• center

• diameter

• circumference

Find the circumference of the circle whose radius is 4 in

• 12.56 in

• 25.12 in

• 50.24 in

• 6.28 in