Geometry Circles Review

Front

What is a point of tangency?

Back

A point where a tangent touches a circle.

Front

What is a radius?

Back

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

Front

What is a chord?

Back

A line segment whose endpoints lie on the circle.

Front

What is a secant?

Back

A line that intersects a circle at two points.

Front

What is a tangent?

Back

A line that touches a circle at exactly one point.

Front

If the measure of arc ABC = 210°, what is the measure of arc AC?

Back

150°

Front

What is the definition of a circle?

Back

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

Front

What is the relationship between a tangent and a radius at the point of tangency?

Back

The tangent is perpendicular to the radius at the point of tangency.

Front

What is the measure of a semicircle?

Back

180°.

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.