SJ Importants
1. Triangle Exterior Angle
2. Angles and Tangents of a Circle
3. Rotation in 3d
4. Four color challenge

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SJ Importants

Mohamed jihan, Jun 12, 2017

1. Triangle Exterior Angle
2. Angles and Tangents of a Circle
3. Rotation in 3d
4. Four color challenge

Information

1.

Triangle Exterior Angle

In the app below, an exterior angle of a triangle is shown. The 2 colored angles are referred to as its remote interior angles.

Interact with this app for a few minutes. LARGE POINTS are moveable.

What can we conclude about the measure of an exterior angle when we compare it to its remote interior angles? Explain.

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What other theorem is readily made obvious here?