170o is > 90o and < 180o so it is an obtuse angle.
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An angle of 170 degrees is an obtuse angle.
A 170 degree angle is obtuse because it is greater than 90 but less than 180 degrees.
Angles between 90 and 180 degrees are called obtuse.
170 degrees
If one angle is 10 degrees, its opposite angle is also 10 degrees. Since consecutive angles are supplementary, each pair of angles has to add up to 180 degrees so the other angles have to be 170 degrees. Therefore this parallelogram has two 10 degree angles and two 170 degree angles.