
Developing Angle Relationships for Triangles
Presentation
•
Mathematics
•
5th - 12th Grade
•
Hard
Joseph Anderson
FREE Resource
6 Slides • 1 Question
1
Properties of Triangles
Lesson 13 - 1: Angle Relationships in Triangles
2
Lesson 13 - 1 Angle Relationships in Triangles
Learning Targets:
Prove theorems about angle measures in triangles
Apply theorems about angle measures in triangles
3
Triangle Sum Theorem
Given the triangle at the right,
Cut the three angles from the triangle
Line the angles beside each other on the next slide
4
Triangle Sum Theorem
The three angles will form a line
The sum of the angles equal
180°43° + 32° +105° = 180°
5
6
Find the measure of ∠A
m∠A=180°−(30°+96°)
m∠A=180°−126°
m∠A=54°
7
Multiple Choice
What is the measure of ∠B ?
m∠B=75°
m∠B=115°
m∠B=105°
m∠B=95°
Properties of Triangles
Lesson 13 - 1: Angle Relationships in Triangles
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