construction
use a straight edge and a compass to draw geometric figure
straightedge
is a ruler with no markings
compass
geometric tool used to draw circles and parts of circles called arcs
perpendicular line
two lines that intersect from right angles
perpendicular bisector
of a segment is a line, segment or ray that is perpendicular to the segment at its midpoint
angle bisector
a ray that divides an angle into two congruent coplanar angles