9-2 Tangents

Theorem If a line is tangent to a circle then the line is ___________ to the radius drawn to the point of tangency. perpendicular

If a line is tangent to a circle then the line is ___________ to the radius drawn to the point of tangency.

Theorem If two segments from the same exterior point are tangent to a circle, then they are congruent. S R P T __ __ SR  ST

If two segments from the same exterior point are tangent to a circle, then they are congruent.

Theorem If a line is  to a radius of a circle at its endpoint on the circle, then the line is tangent to the circle

If a line is  to a radius

of a circle at its endpoint

on the circle, then the

line is tangent to

the circle

Tangent Circles Two circles that intersect at one point. Externally Tangent

Tangent Circles Two circles that intersect at one point. Internally Tangent

Common Tangent A line that is tangent to two circles. External - Does NOT cut through the line that connects the circles centers

A line that is tangent to two circles.

External - Does NOT cut through the line that connects the circles centers

Common Tangent A line that is tangent to two circles. Internal - cuts through the line that connects the circles centers

A line that is tangent to two circles.

Internal - cuts through the line that connects the circles centers

SPICSA 335 2-14 even

335 2-14 even