An angle of 45 degrees can be constructed by bisecting a right angle with a pair of compasses and a straight edge or merely using a protractor.
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Use a straight edge and a protractor to construct an acute angle of 65 degrees
45 degrees. 45 degrees
a right-angle is 90 degrees so half that 45 degrees your answer is 45 degrees
45 degrees and 45 degrees.
Use a protractor or construct perpendicular lines that will intercept each other at 90 degrees and 3/4 around the lines will give a reflex angle of 270 degrees