1. Classifying Triangles and the Sum of the Measures in a Triangle Day 4

2. Day 4 Math Review

3. Goals/Objectives Classify triangles by their angle measures and side lengths. Use triangle classification to find angle measures and side lengths. Find the measures of interior and exterior angles of triangles. Apply theorems about the interior and exterior angles of triangles.

4. Vocabulary acute triangle equiangular triangle right triangle obtuse triangle equilateral triangle isosceles triangle scalene triangle auxiliary line corollary interior exterior interior angle exterior angle remote interior angle

5. Activity Complete 4-1 exploration (p. 10 in packet) You have 10 minutes. Share a few with the class

7. An auxiliary line is a line that is added to a figure to aid in a proof. An auxiliary line used in the Triangle Sum Theorem

8. A corollary is a theorem whose proof follows directly from another theorem. Here are two corollaries to the Triangle Sum Theorem.

9. The interior is the set of all points inside the figure. The exterior is the set of all points outside the figure. Exterior

10. Each exterior angle has two remote interior angles. A remote interior angle is an interior angle that is not adjacent to the exterior angle. Interior Exterior 3 is an interior angle. The remote interior angles of 4 are 1 and 2.

12. Work Time Complete pages 11-12 in your workbook Complete, Correct pages will be stamped Return to class bin when you are finished

13. Exit Quiz Complete the quiz Show any and all work that you can Circle your answers Turn it in before you leave