Quick Check: Segments, Angles, and Arcs of Circles

Front

What is a Radius?

Back

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

Front

What is a Chord?

Back

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

Front

What is a Tangent?

Back

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

Front

What is a Secant?

Back

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

Front

What is the measure of a full circle in degrees?

Back

360°

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

A = πr², where r is the radius.

Front

What is an Arc?

Back

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

Front

How do you find the measure of a central angle?

Back

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

Front

What is the relationship between inscribed angles and intercepted arcs?

Back

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