Question

Which triangle must be a right triangle and why?

Answer 1

Answer:

Right triangles are triangles in which one of the interior angles is 90 degrees, a right angle. Since the three interior angles of a triangle add up to 180 degrees, in a right triangle, since one angle is always 90 degrees, the other two must always add up to 90 degrees (they are complementary).

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Answer 2

Answer:

the triangle must be the right angle 90 degrees because that is the right angle triangle 90degrees when that the 90degrees above is not called right angle . called obtuse angle . s that is region . thank-you