Topic 71 Intro to Circles and Tangent Theorems

Front

A line that touches (intersects) the circle only once from the outside.

Back

Tangent

Front

A line that intersects a circle at two points is a ______________.

Back

Secant

Front

The distance from the center to the edge of the circle.

Back

Radius

Front

In the diagram, a tangent and a line drawn to the point of tangency form a right triangle. Solve for '?' (the length of the hypotenuse).

Back

15

Front

Find the radius r.

Back

3

Front

The longest chord of a circle is called the ______________.

Back

Diameter

Front

A line segment with both endpoints on the circle is called a ______________.

Back

Chord

Front

The point where a tangent touches a circle is called the ______________.

Back

Point of Tangency

Front

The angle formed between a tangent and a radius drawn to the point of tangency is ______________.

Back

90 degrees (right angle)

Front

The relationship between the radius and diameter of a circle is ______________.

Back

Diameter = 2 x Radius