The 3 interior angles of any triangle add up to 180 degrees
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Any triangle with a 90 degree angle is classified as a right triangle.
Obtuse triangle
100 degrees
It is a right angle triangle and its 3rd angle is 70 degrees.
In right triangle ABC, angle C is a right angle, AB = 13and BC = 5 What is the length of AC? Draw the triangle to help visualize the problem.