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Mathematics

1 answer:

Dmitriy789 [7]3 years ago

3 0

An exterior angle is formed by one side of the triangle, and a side EXTENDED outside the triangle. Two angles are like that, ∠4 and ∠2.

Angle 3 is NOT an exterior angle because it is made up of two extended sides. It does not use one of the sides of the triangle.

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