Question

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what is the sum of an angle of a triangle?​

Answer 1

Answer:

In a Euclidean space, the sum of angles of a triangle equals the straight angle. A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides. It was unknown for a long time whether other geometries exist, for which this sum is different.

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Answer 2

Answer:

In a Euclidean space, the sum of angles of a triangle equals the straight angle. A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides. It was unknown for a long time whether other geometries exist, for which this sum is different.

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