Parts of a Circle

Front

What is the definition of a Radius in a circle?

Back

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

Front

What is a Tangent Line?

Back

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

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.

Front

What is a Major Arc?

Back

A major arc is an arc that is larger than a semicircle, covering more than 180 degrees.

Front

What is a Chord?

Back

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

Front

What is a Sector in a circle?

Back

A sector is a region enclosed by two radii and the arc between them.

Front

What is a Segment in a circle?

Back

A segment is a region of a circle bounded by a chord and the arc connecting the endpoints of the chord.

Front

What is 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 formed by two chords in a circle which share an endpoint.

Front

What is a Minor Arc?

Back

A minor arc is an arc that is smaller than a semicircle, covering less than 180 degrees.