Question

In a Euclidean space, the sum of measures of three angles of any triangle is invariably equal to the straight angle, also expressed as 180 degree, radians, two right angles or a half turn. Solve it​

Answer 1

Answer:

In a Euclidean space, the sum of measures of these three angles of any triangle is invariably equal to the straight angle, also expressed as 180 °, π radians, two right angles, or a half-turn. It was unknown for a long time whether other geometries exist, where this sum is different.

Answer 2

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In a Euclidean space, the sum of angles of a triangle equals the straight angle (180 degrees, π radians, two right angles, or a half-turn). A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides.

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