1. Warm Up. What measure is needed to find the circumference or area
of a circle?
Find the radius of a circle with diameter 8 centimeters.
A right triangle has legs with length 5 inches and 12 inches.
Find the length of the hypotenuse
Solve 6𝑥+15=33
5. Solve 𝑥 = 𝑥

3. Terms To Know Circle: A set of all points in a plane
equidistant from a given point.
Radius: A segment whose endpoints
are the center and a point on the circle
Chord: A segment whose endpoints
are on the circle
Diameter: A chord that contains
center
Secant: A line that intersects a circle
at two points
Point of Tangency
Tangent: A line that intersects the circle
at one point ( point of tangency )

4. Practice:

5. Terms To Know Common Tangents: A line/ray/segment that is tangent to
two coplanar circles.

6. 4 2 3
NONE

7. Theorem 10.1
In a plane, a line is tangent to a circle if and only if the line
Is perpendicular to a radius of the circle at its endpoint on
The circle.

8. Practice: T

9. Practice:

11. Practice:

12. Practice:

13. Homework: Page 655: 3 – 11 all, 23, 25, 29 Have fun with This one!!!
Hint: use Pythagorean
Theorem