Circle Terms
Radius
Diameter
Finding Circumference
Formulas
100

What is the distance from the center of the circle to the outside edge?

Radius

100

The diameter of a circle is 20 meters. What is the radius?

10 meters

100

What is the diameter of a circle that has a radius of 12 centimeters?

24 centimeters

100

Find the circumference of the circle below.

84m 

100

What is the formula you use for finding circumference?

C=πd

200

What is the straight line that passes through the center of the circle that has endpoints on the circle?

Diameter

200

Find the radius from the given circle.

9 inches

200

The radius of a clock is 6 inches. What is the diameter?

12 inches

200

Find the circumference of the circle below.

108 feet

200

What formula would you use if you are looking for diameter?

d=2r

300

Key words for this are:

Around, Border, Trim, Revolution, Rotation

Circumference

300

Find the radius of the given circle.

18 feet

300

What is the diameter?

24 inches

300

Find the circumference of the circle below.

15 cm

300

What formula would you use to find the diameter?

C=πd

400

What is the amount of space inside of a circle?

Area

400

The circumference of a circle is 18 centimeters. What is the radius?

3 centimeters

400

The circumference of a circle is 36 centimeters. What is the diameter of this circle?

13 centimeters

400

Find the circumference of the circle below.

84 meters

400

What formula would you use to find the distance around a circle?

C=πd

500

What is a line though the circle called?


Chord

500

The circumference of a meteor is 132 meter. What is the radius of this meteor?

22 meters

500

Find the diameter of a circle with a circumference of 150 millimeters. 

50 millimeters

500

Find the circumference of both circle combined.

66 inches

500

What formula would you use to find the radius of a circle if you are given the diameter?

r=d/2