Mastering Circle Vocabulary: Key Terms and Concepts

Which of the following points is inside the circle but not on the circle?

• Point A

• Point D

• Point B

• Point P

Tags

CCSS.4.G.A.1

What is the term for the distance from the center of the circle to any point on the circle?

• Diameter

• Radius

• Secant

• Chord

Which segment is an example of a diameter?

• Segment AC

• Segment PB

• Segment AB

• Segment PA

Tags

CCSS.HSG.CO.A.1

What is a chord?

• A line that passes through the circle at two points

• A segment that connects any two points on the circle

• A segment from the center to any point on the circle

• The longest segment that can be drawn in a circle

Which of the following is NOT a chord?

• Segment PA

• Segment AC

• Segment BD

• Segment AB

What is a secant?

• A segment that connects two points on the circle

• A segment from the center to any point on the circle

• A line that passes through the circle at two points

• A line that intersects the circle at exactly one point

Tags

CCSS.HSG.C.A.2

How does a tangent differ from a secant?

• A tangent is always longer than a secant

• A tangent intersects the circle at one point, while a secant intersects at two points

• A tangent intersects the circle at two points

• A tangent is a segment, while a secant is a line

What is a minor arc?

• A line that passes through the circle at two points

• A piece of the circle that extends more than halfway around

• A piece of the circle that extends less than halfway around

• A segment that connects two points on the circle

How is a major arc different from a minor arc?

• A major arc extends less than halfway around the circle

• A major arc is always written with two letters

• A major arc is a segment, while a minor arc is a line

• A major arc extends more than halfway around the circle

How should a semicircle be denoted?

• With two letters indicating the start and end points

• With three letters indicating the start, end, and a point in between

• With four letters indicating all points on the arc

• With a single letter indicating the midpoint