Construct and angle and bisect it, that should do it.
Use a protractor.
With a protractor
There are a lot of videos and applets out there that explain how to construct an angle bisector.
Use a protractor.
120degrees
Yes
Use a straight edge and a protractor to construct an acute angle of 65 degrees
obtuse angle: an angle larger than 900
Construct and angle and bisect it, that should do it.
A protractor is normally used to construct angles.
Draw angle C and bisect it into A & B.
Use a protractor.
With a protractor
There are a lot of videos and applets out there that explain how to construct an angle bisector.
With a protractor and a straight edge
Use a protractor.