Study Guide for Test 1

Name the Circle

• Circle A

• Circle G

• Circle E

• Circle F

The RADIUS of a Circle

• GD

• DC

• BA

• EC

The DIAMETER of the circle

• GD

• BA

• EA

• EC

True or False: These circles are CONGRUENT

• True

• False

True or False: These circles are CONGRUENT

• True

• False

Calculate the CIRCUMFERENCE, when the DIAMETER is 6

• $C=6\pi\approx18.8$

• $C=12\pi\ \approx37.7$

• $C=3\pi\approx9.4$

• $C=9\pi\approx28.3$

Calculate the CIRCUMFERENCE, when the RADIUS is 2.1

• $C=2.1\pi$

• $C=4.2\pi$

• $C=3.14\pi$

When the CIRCUMFERENCE is 56, what is the DIAMETER?

• 17.8

• 28

• 56

When the CIRCUMFERENCE is 112.8, what is the DIAMETER?

• 112.8

• 35.9

• 56.4

The CIRCUMFERENCE of a circle is 25.12. What is the RADIUS?

• 4

• 8

• 25.12