To bisect an angle merely means to divide the angle
into two equal angles. his may be done by use of a
Bisect Z ABC.
Draw an arc with the radius less than the
shorter of AB or BC intersecting AB and BC
at points X and Y.
From X and Y using the same radius, draw
arcs intersecting at point F.
Draw BF which will bisect L ABC.
It is often necessary in sheet metal layout to con-
struct an angle that equals a given angle.
Construct an angle L PMN equal to Z ABC.
From B, draw an arc with a convenient
radius which intersects AB and CB at points
X and Y.
Using the same radius, draw an arc from M
intersecting MN at point O.
With X as center, set the compass to a radius
which will pass an arc through Y.
Using this radius (Step 3) and O as center,
draw an arc that will intersect the arc drawn
from M in Step 2 at point P.
Draw PM completing PMO.
Lines are said to be perpendicular when they form
a right angle (90°).
A perpendicular may be drawn to a line in several
1. Using an object which has a right angle, such as
a drawing triangle.
2. Using a compass from a point on a line.
Construct a perpendicular to AB at point C.