Circles & Circumference

Front

What is the name of the circle with center L?

Back

Circle L

Front

If AB = 18cm, what is the length of AR?

Back

9 cm

Front

What is the circumference of a circle with a diameter of 15 inches?

Back

15π cm

Front

If the diameter of circle L is 20 units and the diameter of circle M is 13 units, and QR = 4, what is LQ?

Back

6 units

Front

A _________ is a segment in a circle that has endpoints on the circle.

Back

Chord

Front

What is the formula for the circumference of a circle?

Back

C = πd or C = 2πr

Front

What is the radius of a circle with a diameter of 10 cm?

Back

5 cm

Front

What do you call the longest chord in a circle?

Back

Diameter

Front

If the radius of a circle is 7 cm, what is the area of the circle?

Back

49π cm²

Front

What is the relationship between the radius and diameter of a circle?

Back

Diameter = 2 × Radius