muha313


 * __9.1__**


 * Objectives-**
 * Define a circle and its associated parts, and use them in constructions.
 * Define and use the degree measure of arcs
 * Define and use the length measure of arcs.
 * Prove a theorem about chords and their intercepted arcs.

__**Definitions:**__

ex
 * Circle**- The set of all points in a plant are equidistant from a given point in the plane known as the xenter of the circle.


 * Radius**-Segment from the center of the circle to a point on the circle.


 * Chord**- Segment whose endpoints line on circle.


 * Diameter**- Chord that contains the center of a circle.


 * Central angle**- Angle in the plane of a circle whose vertex is the center of the circle.


 * Intercepted arc**- Arc whose endpoints lie on the sides of the angle and whose other points lie in the interior of the angle.

major- 360 degrees minus the degree measure of its minor arc.
 * Degree measure of Arcs(minor**)- Measure of its central angle.


 * Arc length**- L= M/360 degrees (2(3.14)r)


 * Chords and Arcs theorem**- In a circle, or in congruent circles, the arcs of congruent chords are

a circle with a diameter of 30 and a central angle of 20 degrees L = 20/360(2pi 15) L= 31.4
 * Example:**

. link to 9.2