Circles Review 5-2

Front

What is a circle?

Back

A circle is a set of points in a plane that are equidistant from a fixed point called the center.

Front

Define radius.

Back

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

Front

What is a chord?

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 and is twice the length of the radius.

Front

What is the circumference of a circle?

Back

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 a tangent line?

Back

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

Front

How do you find the length of a tangent line from a point outside the circle?

Back

The length of the tangent line can be found using the Pythagorean theorem.

Front

What is the relationship between overlapping arcs and inscribed angles?

Back

The measure of an inscribed angle is equal to half the sum of the measures of the arcs that it intercepts.