Question

what type of angle is this? a b c obtuse straight right acute

Explanation:

An acute angle measures less than 90 degrees. An obtuse angle measures more than 90 degrees but less than 180 degrees. A right - angle measures exactly 90 degrees and a straight angle measures 180 degrees. By visual inspection, the angle ∠ABC appears to be less than 90 degrees.

Answer:

D. acute