An acute angle is 90 degrees and less . so an acute can be 15 degrees
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Between 15 and 20 degrees...
No. An obtuse angle has a measure of between 90 and 180 degrees.
The sum of an angle and its complement is 90 degrees. So the unknown angle must be 90 - 75 = 15 degrees.
.15 x 360 degrees = 54 degrees
15 degrees from the normal - on the other side.