The following construction shows _______ degrees.

Steps for construction for 45^o :

1. Draw a line segment of any measure, say OZ.
2. Extend the line segment from one of the endpoints, for instance, extend O towards the left.
3. Now taking O as a centre and any radius, draw an arc cutting the extended line at P and OZ at N.
4. Keeping P and N as centres and taking any radius mark two arcs intersecting at Q.
5. Join OQ.
6. Now by taking any radius mark an arc cutting OQ and OZ at A and B respectively.
7. Taking A and B as centres and any radius, mark two intersecting arcs, intersecting at M.
8. Join OM.