Solution:Step 1.Step 2.Step 3.Draw an arc from C as a center, using anyconvenient radius cutting AC and CB at Xand Y.Increase the size of the radius and from Xand Y, draw arcs which intersect at point F.Draw CF which is perpendicular to AB atpoint C.3. Using a compass, from a point outside the line.Example:Draw a perpendicular to AB from C.Step 1.Step 2.Step 3.From C, draw an arc using any convenientradius, intersecting AB at X and Y.Using the same radius, draw arcs from Xand Y intersecting at F.Draw CF, which is perpendicular to AB.4. Using a compass from a point at the end of a line.Example:Draw a perpendicular to AB from B.Solution:Step 1.Step 2.Step 3.Step 4.Step 5.From B, swing an arc with any convenientradius intersecting AB at O and continuingin a clockwise direction at least 120°.From O, using the same radius, draw an arcintersecting the arc drawn in Step 1 and X.From point X, draw an arc with the sameradius intersecting the arc drawn in Step 1at Y.From X and Y, draw arcs using the sameradius intersecting at F,Draw FB perpendicular to AB at B.PARALLEL LINESTwo lines are said to be parallel if they are equidis-tant (equally distant) at all points.Facts about parallel lines:Two straight lines lying in the same plane eitherintersect or are parallel.Through a point there can be only one paralleldrawn to a given line.If two lines are perpendicular to the third, and in thesame plane, they are parallel.BISECTING LINESIt is often necessary to find the midpoint of a line.This may be found by measuring, or by using dividersand finding it by trial and error. A much simpler way isby the use of a compass.Example:To bisect a line AB by using a compass:AII-5