10.1-10.2 Circle Vocabulary

Front

What is the definition of a Radius?

Back

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

Front

What is the definition of a Diameter?

Back

A diameter is a line segment that passes through the center of a circle and has its endpoints on the circle. It is twice the length of the radius.

Front

What is a Central Angle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii that extend to the circumference.

Front

What is a Chord?

Back

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

Front

What is a Minor Arc?

Back

A minor arc is an arc that is smaller than a semicircle, defined by two endpoints on the circle.

Front

What is a Major Arc?

Back

A major arc is an arc that is larger than a semicircle, defined by two endpoints on the circle.

Front

What is a Semi-Circle?

Back

A semi-circle is half of a circle, formed by a diameter and the arc connecting its endpoints.

Front

What is the definition of Circumference?

Back

Circumference is the distance around the circle, calculated as C = 2πr, where r is the radius.

Front

What is an Inscribed Angle?

Back

An inscribed angle is an angle formed by two chords in a circle which have a common endpoint.

Front

What is the relationship between a Chord and a Diameter?

Back

A diameter is the longest chord in a circle, as it passes through the center.