construction
a geometric figure drawn with the help of a compass and straightedge
perpendicular lines
two lines that intersect to form right angles
straightedge
a ruler with no markings on it
perpendicular bisector
a ray or line or other things that are perpendicular to another rays midpoint bisecting it into two equal congruent parts
angle bisector
a ray that divides an angle into two coplanar angles
compass
tool used to draw circles and parts of circles call arcs