1. Bell Ringer: Quiz Review 1.) Define a.) Collineard.) Obtuse b.) Coplanare.) Right c.) Acute Solve for x 2.) 3.) A B C 2x + 115 AC = 8X + 4 A B C D 3x + 5 2x + 1 <ABC = 10x - 15

2. Section 1.5 Don't go around saying the world owes you a living. The world owes you nothing. It was here first. Mark Twain Mark Twain

3. Adjacent Angles – Two angles in the same plane with common vertex and side, but no common interior points (they don’t overlap) A B C D

4. Vertical Angles – Two non adjacent angles with a common vertex, but no common sides. (Formed by intersecting lines) Always Congruent ( =) A B C D E

5. Linear Pair – Two angles formed by a straight line, two adjacent angles whose non common sides are opposite rays. AB C D

6. Complementary angles – Sum of 90 Part A + Part B = 90 Supplementary angles – sum of 180 Part A + Part B = 180

7. Perpendicular Lines – Two lines that form a right (90 degree) angle Symbol:

8. Can you find each type of angle? Adjacent Linear Pair Supplementary Vertical A D E C H B G 60 30 90 30 60 90

9. Angle Bisector - splits an angle into two equal parts. < ABD = < DBC A B C D

10. Class Work Page 38 - 39 # 7 – 15 # 25 - 30