lesson 12-1

Question 1

tangent to circle

Answer 1

a line that intersects a circle at exactly 1 point

Question 2

point of tangency

Answer 2

point where a tangent and circle intersect

Question 3

thm 12-1

Answer 3

if a line is tangent to a circle, then the line if perpendicular to the radius at the point of tangency

Question 4

thm 12-2

Answer 4

if a line is in the plane of a circle is perpendicular to a radius at its endpoint on the circle, then the line is tangent to the circle.

Question 5

thm 12-3

Answer 5

if two tangent segments to a circle share a common endpoint outside the circle then the two segments are congruent