Parts of a Circle

The given point from which all points on a circle are the same distance.

​Center

Draw

Draw the center on this circle.

A line segment from the center to a point on the circle.

​Radius

Draw

Draw a RADIUS on this circle.

A segment that passes through the center.

​Diameter

Draw

Draw a DIAMETER on this circle.

A line segment whose endpoints lie on the circle.

​Chord

Draw

Draw a CHORD on this circle.

A line that intersects a circle at TWO points.

Secant

Draw

Draw a SECANT on this circle.

A line that intersects a circle at ONE point called the point of tangency.

Tangent Line & Point of Tangency

Draw

Draw a TANGENT L on this circle.

An angle whose vertex (Pointy part) is at the center of the circle.

Central Angle

Draw

Draw a CENTRAL ANGLE on this circle.

An angle whose vertex (Pointy part) is ON the circle.

Inscribed Angle

Draw

Draw an INSCRIBED ANGLE on this circle.

Multiple Choice

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

Multiple Choice

What is BD?

• Chord

• Radius

• Secant

• Tangent

Multiple Choice

What is AF?

• Chord

• Radius

• Secant

• Tangent

Multiple Choice

What is A?

• Point of Tangency

• Radius

• Center

• Tangent

Multiple Choice

What is H?

• Point of Tangency

• Radius

• Circle

• Tangent

Multiple Choice

What is DG?

• Secant

• Radius

• Chord

• Tangent

Multiple Choice

What is  $$\overline{JI}$$   ?

• Radius

• Diameter

• Central Angle

• Tangent

Multiple Choice

Which is a point of tangency?

• K

• L

• H

• J  

Multiple Choice

Name the pictured part of the circle.

• Radius

• Central Angle

• Sector

• Center

Multiple Choice

Name the pictured part of the circle.

• Center

• Sector

• Radius

• Central Angle

Multiple Choice

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Central Angle

• Inscribed Angle

Multiple Choice

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Central Angle

Multiple Choice

Name the pictured part of the circle.

• Diameter

• Sector

• Radius

• Chord

• Arc