8.GM.5 - Triangle Angle Theorems

Applet powerfully illustrates to the student that the sum of the measures of the interior angles of any triangle is 180 degrees, and that the sum of the measures of the exterior angles of any triangle is 360 degrees. ("Proof" without words.)
View Activity View Activity

 

Sharon Mahon —

 
Resource Type
Activity
Tags
angle  ccss  ccss.hsg.co.c.10  common  common-core  core  exploration  exterior-angle  theorem  triangle-angle-sum  triangles Show More…
Target Group (Age)
11 – 14
Language
English
 
 

Books

 
© 2025 International GeoGebra Institute