1. Homework Answers

4. Secants and Tangents

5. Definitions
Tangent: a line that intersects a circle in exactly one place
Point of tangency: point at which the tangent intersects the circle
Secant: a line that intersects a circle in two places

6. What do you notice about the relationship between the intersecting radii and tangents?

7. Other Facts…
If a line is tangent to a circle, then the line is perpendicular to the radius drawn to the point of tangency.

8. When the radius is perpendicular to a chord(secant) what do you notice?

9. Other Facts…
If a line is tangent to a circle, then the line is perpendicular to the radius drawn to the point of tangency.
A radius that is perpendicular to a chord of a circle bisects the chord.