Parts of Circles Flashcard Review

Front

What is a semicircle?

Back

A semicircle is an arc that represents half of a circle, measuring 180 degrees.

Front

What is the measure of a full circle?

Back

A full circle measures 360 degrees.

Front

What is a minor arc?

Back

A minor arc is an arc that measures less than 180 degrees.

Front

What is a major arc?

Back

A major arc is an arc that measures more than 180 degrees.

Front

What is a chord?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

What is a radius?

Back

A radius is a line segment from the center of the circle to any point on the circle.

Front

What is a diameter?

Back

A diameter is a chord that passes through the center of the circle, measuring twice the length of the radius.

Front

What is a secant?

Back

A secant is a line that intersects a circle at two points.

Front

What is a tangent?

Back

A tangent is a line that touches a circle at exactly one point.

Front

How do you calculate the measure of an arc?

Back

The measure of an arc can be calculated based on the central angle that subtends it.