Secants, Tangents, Arcs, Inscribed Angles Test

Front

What is a secant line?

Back

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

Front

What is a tangent line?

Back

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

Front

Define an arc in a circle.

Back

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

Front

What is an inscribed angle?

Back

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

Front

How do you find the measure of an inscribed angle?

Back

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

Front

What is the relationship between a tangent and a radius?

Back

A tangent to a circle is perpendicular to the radius drawn to the point of tangency.

Front

How do you calculate the length of an arc?

Back

The length of an arc can be calculated using the formula: (θ/360) * 2πr, where θ is the central angle in degrees and r is the radius.

Front

What is the measure of a central angle?

Back

The measure of a central angle is equal to the measure of the arc it intercepts.

Front

If two chords intersect inside a circle, how do you find the measure of the angles formed?

Back

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

Front

What is the formula for the measure of an exterior angle formed by two secants?

Back

The measure of the exterior angle is equal to half the difference of the measures of the intercepted arcs.