BISECTING ANGLESTo bisect an angle merely means to divide the angleinto two equal angles. his may be done by use of acompass.Problem:Bisect Z ABC.Solution:Step 1.Step 2.Step 3.Draw an arc with the radius less than theshorter of AB or BC intersecting AB and BCat points X and Y.From X and Y using the same radius, drawarcs intersecting at point F.Draw BF which will bisect L ABC.Conclusion:TRANSFERRING ANGLESIt is often necessary in sheet metal layout to con-struct an angle that equals a given angle.Given:1ABCProblem:Construct an angle L PMN equal to Z ABC.Solution:Step 1.Step 2.Step 3.Step 4.Step 5.From B, draw an arc with a convenientradius which intersects AB and CB at pointsX and Y.Using the same radius, draw an arc from Mintersecting MN at point O.With X as center, set the compass to a radiuswhich will pass an arc through Y.Using this radius (Step 3) and O as center,draw an arc that will intersect the arc drawnfrom M in Step 2 at point P.Draw PM completing PMO.Conclusion:PERPENDICULARS LINESLines are said to be perpendicular when they forma right angle (90°).A perpendicular may be drawn to a line in severalways.1. Using an object which has a right angle, such asa drawing triangle.2. Using a compass from a point on a line.Example:Construct a perpendicular to AB at point C.AII-4

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