Circles and Tangent Lines

Front

A line segment that connects the center of a circle to any point on the circle is called ...

Back

Radius

Front

A line segment whose endpoints are on a circle is a ...

Back

Chord

Front

Line segment AB is tangent to circle C. What is the radius of the circle if AB = 10?

Back

10

Front

A tangent line to a circle ...

Back

Makes a 90 degree angle with the radius of the circle.

Front

Line segment AB and AD are both tangent to circle C. If AB = 4, what is the value of x?

Back

4

Front

The longest chord in a circle is called ...

Back

Diameter

Front

The distance from the center of a circle to any point on the circle is known as ...

Back

Radius

Front

A line that intersects a circle at exactly one point is called ...

Back

Tangent line

Front

If two tangents are drawn from a point outside a circle, the lengths of the tangents are ...

Back

Equal.

Front

The formula for the circumference of a circle is ...

Back

C = 2πr, where r is the radius.