30
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It is a right angle triangle and the 3rd angle will measure 30 degrees
The third angle measures 85⁰ (20 + 75 + 85 = 180) consequently, the triangle is an acute angled scalene triangle
It is a right angle triangle providing that the 3rd angle is 30 degrees.
It is a right angle triangle because it has a 90 degree angle and the 3 angles add up to 180 degrees.
Acute triangle Equal triangle