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Exterior Angle Theorem – MATH

Use informal arguments to establish facts about the angle sum and exterior angle of triangles. Based on Common Core Standard 8 .G.A.5

Which angle is an exterior angle?

A B C D
The Exterior Angle Theorem states that the exterior angle of a triangle:

is smaller than either of the interior angle's measures. is twice the measure of the interior angles. is greater than either of the interior angle's measures. is equivalent to the larger interior angle.
The Exterior Angle Theorem states that the exterior angle of a triangle:

is smaller than either of the interior angle's measures. is twice the measure of the interior angles. is the measure of the smaller interior angle's measure. is equivalent to the sum of the opposite interior angles.
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