True
True -
no
True
Yes
An angle of 65° can not be trisected using a compass and straight edge.
True
true
True -
no
True
Yes
Constructions that are impossible using only a compass and straightedge include Trisecting an angle Squaring a circle Doubling a cube
As a general rule, no.
Yes
True.
Use a protractor to measure the angle. Divide that number by 3 and that is the required angle. In general, an angle cannot be trisected using a compass and straight edge.