Teacher Script & Notes
What to say / Spoken Script
The interior angles of any triangle always add up to exactly 180 degrees. If we tear the three corners off a triangle and place them side-by-side, they form a straight line, which is exactly 180 degrees.
What to do / Action Guide
Display the triangle corners aligning together to create a straight line of 180 degrees.
Pedagogical Tips
Use colored wedges to make the corner alignment highly visible.
Step 1: Introduction
Step 1 of 1
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