Tangent Lines and Circles

Front

What is the radius of a circle?

Back

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

Front

Which term describes segment AB if it passes through the center of the circle?

Back

Diameter

Front

What is the diameter of a circle with a radius of 8?

Back

16

Front

If two lines appear to be tangent to a circle, what can we assume about their relationship to the circle?

Back

They are tangent.

Front

Is line AB tangent to the circle if it touches the circle at exactly one point?

Back

YES

Front

What is a chord in a circle?

Back

A segment whose endpoints lie on the circle.

Front

What is a secant line?

Back

A line that intersects a circle at two points.

Front

Define a tangent line in relation to a circle.

Back

A line that touches the circle at exactly one point.

Front

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

Back

The radius is perpendicular to the tangent line.

Front

If the diameter of a circle is 20, what is the radius?

Back

10