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Question

An exterior angle of a triangle is 105° and its two interior opposite angles are equal. The measure of each of these two angles is __________.

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Solution


Let the measure of each of the two interior opposite angles be x.

Measure of exterior angle of triangle = 105°

We know that the exterior angle of a triangle is equal to the sum of the two interior opposite angles.

x+x=105°

2x=105°

x=105°2=52.5°

An exterior angle of a triangle is 105° and its two interior opposite angles are equal. The measure of each of these two angles is ___52.5º___.

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