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The interior angles of a 2-D triangle will always add up to 180 degrees. To determine the measure of the third angle: 180 - (32 + 75) = 73 degrees
The third angle measures 85⁰ (20 + 75 + 85 = 180) consequently, the triangle is an acute angled scalene triangle
The third angle is 30°, and there's no way to determine the lengths of the sides from the information given.
The sum of an angle and its complement is 90 degrees. So the unknown angle must be 90 - 75 = 15 degrees.