Construction
using a straightedge and a compass to draw a geometric figure
Compass
a geometric tool used to draw circles and parts of circles called arcs
Perpendicular Lines
two lines that intersect to form a right angle
Perpendicular bisector
a line, segment or ray that is perpendicular to the segment at its midpoint, bisecting the segment into two congruent parts
Straightedge
a ruler with no markings on it
Angle Bisector
a ray that divides an angle into two congruent coplanar angles. Its endpoint is an angle vertex.