Circle Vocab #1

Front

What is a tangent line?

Back

A line that touches a circle at exactly one point.

Front

What is a diameter of a circle?

Back

A segment whose endpoints are on the circle and passes through the center.

Front

Define radius in the context of a circle.

Back

The measurement from the center of a circle to an edge of the circle.

Front

What is a chord in a circle?

Back

A segment whose endpoints are on the circle.

Front

What is the circumference of a circle?

Back

The distance around the circle.

Front

What is the difference between an internal and external tangent?

Back

An internal tangent intersects the segment connecting the centers of two circles, while an external tangent does not.

Front

How do you calculate the diameter if you know the radius?

Back

Diameter = 2 x Radius.

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius.

Front

What is a secant line?

Back

A line that intersects a circle at two points.

Front

What is the center of a circle?

Back

The point that is equidistant from all points on the circle.