CPM Teacher Tutorials

CC3 9.1.2: Triangle Angle Sum Theorem (Desmos)

Updated on

Triangle Angle Sum Theorem (Desmos)

Use this eTool to demonstrate the Triangle Angle Sum Theorem.

1. Click the colored points and drag to change the angles.

NOTE: The measurements for each angle are shown at the left panel.  

2. Click the circle at left on line 4 to show wich angles are the same.

Previous Article CC3 8.2.3: Powers of Ten Film
Next Article CC3 9.2.3: 9-85 Student eTool (Desmos)

CC Course 3 eTools - T

General Tools 7
Chapter 1 9
Chapter 2 8
Chapter 3 10
Chapter 4 7
Chapter 5 3
Chapter 6 9
Chapter 7 8
Chapter 8 5
Chapter 9 6
Chapter 10 3

Other Resources