Circles Definitions

Front

What is the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circle's circumference.

Front

What is a tangent in relation to a circle?

Back

A tangent is a line that touches the circle at exactly one point and does not cross into the circle.

Front

What is a minor arc?

Back

A minor arc is the shorter arc connecting two points on a circle, measuring less than 180 degrees.

Front

What is the measure of a minor arc?

Back

The measure of a minor arc is the angle subtended at the center of the circle by the arc.

Front

What is an arc in a circle?

Back

An arc is a portion of the circumference of a circle.

Front

What is a sector in a circle?

Back

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

Front

What is a chord in a circle?

Back

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

Front

What is the diameter of a circle?

Back

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

Front

What is 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 central angle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides intersect the circle.