Unit 11 Intro_ Identify the Parts of a Circle

Front

A round figure whose boundary consists of points equidistant from a fixed point (the center). Example: ⊙J

Back

Circle

Answer explanation

Front

A line that intersects a circle at one point. Example: Line 𝑋𝑀

Back

Tangent

Answer explanation

Front

A segment that has endpoints on the circle. Examples: Segment 𝐴𝐶, Segment 𝐺D

Back

Chord

Answer explanation

Front

A line that intersects a circle at two points. Example: Line 𝐴C

Back

Secant

Answer explanation

Front

The point on a tangent that is on the circle. Example: Point X

Back

Point of Tangency

Answer explanation

Front

A segment that goes through the center of the circle and has endpoints on the circle. Example: Segment 𝐺𝐷

Back

Diameter

Answer explanation

Front

A segment with one endpoint on the circle and one endpoint at the center. It’s half the diameter. Examples: 𝐺𝐽, 𝐽𝐹, 𝐽D

Back

Radius

Answer explanation

Front

An arc with a measure of more than 180 degrees. Example: arc 𝐹𝑋𝐷

Back

Major Arc

Front

An angle with its vertex at the center of the circle. Example: ∠FJD

Back

Central Angle

Front

An arc with a measure of exactly 180 degrees. Example: 𝐺𝐹𝐷

Back

Semicircle