1. Section 5.1 Midsegment Theorem and Coordinate Proof

2. Homework Pg 298 #3-11, 36 (prove 36)

3. Vocabulary Midsegment of a triangle – is a segment that connects the midpoints of two sides of a triangle. Coordinate Proof – placing geometric figures in a coordinate grid, then using variables to represent coordinates.

4. Theorem 5.1: Midsegment Theorem

5. Apply variable coordinates Place an isosceles right triangle in a coordinate plane. Then find the length of the hypotenuse and the coordinates of its midpoint M.

6. Prove the Midsegment Theorem GIVEN : DE is a midsegment of OBC. PROVE : DE OC and DE = OC 1 2 Write a coordinate proof of the Midsegment Theorem for one midsegment.