An Obtuse Angle is more than 90° but less than 180°
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The complement of a 55 degree angle is a 35 degree angle
A 12 degree angle is an acute angle.
83 degree angle
If each interior angle is 171 degrees then each exterior angle is 180-171 = 9 degrees. Sum of all exterior angles (irrespective of number of sides) is 360 degrees So number of sides = 360/9 = 40
It's a 50 degree angle. It's an angle that measures 50 degrees. It's the complementary angle of a 40 degree angle.