Geometry Lessons 1-4, 1-5, and 1-6
Straight
180° angle
Right
90° angle
Construction
A geometric figure drawn using geometric tools
Perpendicular Bisector
A line, segment, or Ray that is perpendicular to the segment
Midpoint
A point that divides a segment into two congruent segments
Angle bisector
A ray that divides an angle into to congruent Coplanar angles
Straightedge
A ruler with no markings
Compass
A tool used to draw circles and arcs
Acute
Angles between 0-90°
Obtuse
Angles between 90-180°
Congruent
Angles with the same measure
Angle
Formed by two rays with the same endpoint
Congruent
Segments with the same length
Perpendicular
Two lines that intersect to form right angles