Circles and Circumference

A segment/chord that runs through the center of the circle (the longest chord).

• Chord

• Diameter

• Radius

• Inscribed Angle

Name the external tangent.

• line PQ

• line RC

• Circles A and B

• There is no external tangent

Point P is called _____.

• a point of tangency

• a tangent

• a vertex

• none of these

C is the name of the ____ .

• center

• circle

• vertex

• radius

Congruent circles must have equal _____.

• radii

• chords

• tangents

• centers

Tags

CCSS.8.G.A.2

Find the circumference of a circle whose diameter joins points (5, -7) and (-3, -1). (Leave your answer in terms of pi.)

Tags

CCSS.7.G.B.4

Find the circumference of a circle with a diameter of 30 mm. (Leave your answer in terms of pi.)

Tags

CCSS.7.G.B.4

The correct name of this circle is ______

• Circle A

• Circle F

• Circle E

An example of a radius of the given circle is ____

An example of a chord of the given circle is _____