Google Classroom
Google Classroom
GeoGebra
GeoGebra Classroom
Sign in
Search
Google Classroom
Google Classroom
GeoGebra
GeoGebra Classroom
GeoGebra
Home
Resources
Profile
Classroom
App Downloads
Rotating Triangles Angle Sum
Author:
Steve Phelps
Play through the construction to see the rotating triangle construction. How does this prove the angle sum is 180 degrees?
GeoGebra
New Resources
apec
判斷錐體
The Red Chair
Pythagorean Day
畫三角形
Discover Resources
The seven friezes
Triangle Vocabulary
Stretchy rectangle
SSS Construction
Discover Topics
Sine
Orthocenter
Confidence Interval
Scatter Plot
Fractal Geometry