Triangle Exterior Angle Sum Theorem

Author:GreenMaths

Move the sliders what do you notice about the exterior angle and the interior opposite angles. you can move the sliders back and drag the points to change the shape of the triangle.

New Resources

Building Triangles with Set Areas
Building Figures with Set Areas
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
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Mondrian's Puzzle

Discover Resources

Discovery Activity - Quadrilaterals & Parallelograms
PS10-1
The Cissoid of Diocles
Derivative Match
Exact quartic through 9 points

Discover Topics

Multiplication
Geometric Mean
Straight Lines
Intersection
Integers