OBJECTIVE
to determine the angles of given piece using bevel protector
APPARATUS
Bevel protector
parts with different angles
Procedure
1) first the bevel protector is checked for any error. we make sure that the gauge gives reading 0 degree with both arm parralell to each other.
2) the given part is marked on its angle. the angles are given in alphabatical order.
3) now we measure an angle by  bevel protector by making the arms of the protector parralel to the sides of the angle of the given piece.
4) one by one, we measure all the sides and draw the geomatrical figure of the piece with the angles measured in the experiment.