An obtuse angle
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A 128 degree angle would be an "obtuse" angle. This is because the angle measurement exceeds 90 degrees. Anything below 90 degrees would be considered an "acute" angle.
Answer = A 180 degree angle is called a Straight Angle!!
what is a 90 degree angle called
A 73 degree angle is an acute angle
128 degrees.An angle's supplement, when added to the original angle, will form a straight (180 degree) angle.