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Geometry Glossary A1

Geometry Terms

Acute Angle Angle measuring less than 90 degrees
Acute Triangle Triangle with all three angles measuring less than 90 degrees.
Alternative exterior angles ...
Altitude of a quadrilateral A segment from a vertex perpendicular to the line containing the opposite side.
Altitude of a triangle A segment from a vertex perpendicular to the line containing the opposite side.
Angle Two rays that have the same origin
Angle bisector A ray that divides an angle into two congruent angles
Apothem The radius of of the inscribed circle of a regular polygon
Arc of a circle Part of a circle on one side of a secant including end points.
Created by: rltracy
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