9/3 8th Grade Period 6

Date: 9/3

Essential Question: how do I find missing angles in triangles?
Opening: Triangle discussion
Work Session: Find missing angle measures for triangles
Closing: Ticket Out The Door

Vocabulary: exterior angles, interior angles,

Standard: Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.
Homework:

1. 25% of 23.45

2. 15% of 99.99

3. 18% of 23. 12
http://www.kutasoftware.com/FreeWorksheets/GeoWorksheets/4-Angles%20in%20a%20Triangle.pdf
 http://www.mathopenref.com/triangleinternalangles.html