Here, degrees =de.
these are the steps to draw an angle of 45de. :-
1.Draw a line AB.
2.Keep the point of the compass at A and draw an arc cutting AB at C.
3.Keep the point of the compass at C and draw an arc cutting the previos arc at D.
4.Keep the point of the compass at D and draw an arc cutting the previous arc at E.
5.Keep the point of the compass at E and draw an arc wherever you feel suitable for drawing a right angle.
6.Keep the point of the compass at Dand draw an arc cutting the arc which you drew for constructing the right triangle at F.
7.Draw a line from A to F. You will get a straight line which will be your right angle.
8.You will get a point between A and F. Name the point G.
9.Keep the point of compass at F and draw an arc.
10.Draw an arc cutting the previous arc at H and produce it to O.
Angle OAB is an angle of 45degrees.
