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According to Angle sum property of a triangle, the sum of which angles should be 180 degrees ?

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Three exterior angles

Three internal angles

Two internal angles and opposite external angle

External angles and the opposite two internal angles

answer is B.

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Detailed Solution

The sum of a triangle's interior angles is supplementary. In other words, the sum of the measures of a triangle's interior angles equals 180°.

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As a result, the triangle sum theorem formula can be written as $∠ A + ∠ B + ∠ C = 180 °$ for a triangle $ABC$ .

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