1.  iPads off; sticker side up.  Compare your homework (definitions) with the person sitting next to you. Discuss any that you have different and decide whose definition describes the polygon best.

3. 1. Find the midpoint of line segment AB if A(4,-1) and B(7, -6) (5.5, -3.5) 2. U is the midpoint of line segment YZ. The coordinates of Y are (4,6) and the coordinates of U are (2,5). Find the coordinates of Z. (0,4)

4.  New Material

5.  A circle is the set of all points in a plane at a given distance (radius) from a given point (center).

6.  A radius is a segment from the center point to an edge of a circle.

8.  The diameter is a line segment containing the center of a circle with endpoints on the circle

10.  A chord is a line segment whose endpoints lie on the circle.

11.  Previously defined.  A diameter is the longest possible chord.

13.  A tangent is a line that intersects the circle only once.

14.  An arc of a circle is two points on the circle and the continuous part of the circle between the points.

15.  A semicircle is an arc of a circle whose endpoints are the endpoints of a diameter.

16.  A minor arc is an arc of a circle that is smaller than a semicircle.

17.  A major arc is an arc of a circle that is larger than a semicircle.

18. Major/Minor Arcs

19.  A central angle is an angle with its vertex in the center of a circle.

20.  Two or more coplanar circles share the same center.