Arcs, Angles, Chords and Tangents

Front

What is an arc in a circle?

Back

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

Front

Define a chord in a circle.

Back

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

Front

What is a tangent to a circle?

Back

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

Front

State the relationship between the angles formed by two intersecting chords.

Back

The measure of the angle formed is equal to half the sum of the measures of the arcs intercepted by the angle and its vertical angle.

Front

What is the Inscribed Angle Theorem?

Back

The inscribed angle is half the measure of the intercepted arc.

Front

How do you find the measure of an angle formed by a tangent and a chord?

Back

The measure of the angle is equal to half the measure of the intercepted arc.

Front

What is the relationship between the angles in an inscribed quadrilateral?

Back

The opposite angles of an inscribed quadrilateral are supplementary (add up to 180 degrees).

Front

If two tangents are drawn from a point outside a circle, what can be said about their lengths?

Back

The lengths of the two tangents are equal.

Front

How do you calculate the measure of an angle formed by two intersecting lines?

Back

The measure of the angle is equal to half the sum of the measures of the arcs intercepted by the angle.

Front

What is the formula for the length of a chord in a circle?

Back