1. Bell Problem

2. 5.2 Use Perpendicular Bisectors Standards: 1.Describe spatial relationships using coordinate geometry 2.Solve problems in math and other contexts

3. Perpendicular Bisector Perpendicular bisector- a segment, ray, line, or plane that is perpendicular to a segment at its midpoint Equidistant- same distance from each figure

4. Perpendicular Bisector Theorem In a plane, if a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment.

5. Converse of the Perpendicular Bisector Theorem In a plane, if a point is equidistant from the endpoints of a segment, then it is on the perpendicular bisector of the segment.

9. Homework pg. 306-307 #3-6, 11-14

10. Bell Problem Solve for x: 3x + 7 = 4x - 15

11. 1.Fold the triangle to form the perpendicular bisectors of the sides. 2.Do the three bisectors intersect at the same point? 3.Label vertices A, B, and C 4.Label point of intersection of the perpendicular bisectors as P 5.Measure AP, BP, and CP

12. Point of Concurrency Concurrent- three or more lines, rays, or segments that intersect at the same point Point of concurrency- the point of intersection of the lines, rays, or segments

13. Concurrency of Perpendicular Bisectors of a Triangle The perpendicular bisectors of a triangle intersect at a point that is equidistant from the vertices of the triangle. If ___, ___, and ___ are perpendicular bisectors, then ___ = ___ = ___

14. Circumcenter Circumcenter- the point of concurrency of the three perpendicular bisectors of a triangle The circumcenter P is equidistant from the three vertices, so P is the center of a circle that passes through all three vertices

15. Circumcenter The circle with center P is said to be circumscribed about the triangle

16. Homework 5.2 Practice A worksheet