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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. |