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Geometry Vocabulary

TermDefinition
Vertical Angles A pair of opposite congruent angles formed by intersecting lines.
Supplementary Angles Angles whose measures have a sum of 180°
Straight Angle An angle that measures exactly 180°
Right Angle An angle that measures exactly 90°
Congruent Angle Angles that have the same measure
Acute Angle An angle that measures less than 90°
Adjacent Angles Angles in the same plane that have a common vertex and a common side but do not measure the same.
Obtuse Angles An angle that measures more than 90°
Complementary Angles Two angles whose measures add up to 90°
Perimeter The length around a 2D shape.
Area The amount of 2D space taken up by an object.
Diameter A line segment that goes through the center of a circle.
Volume The amount of 3D space occupied by a figure.
Surface Area The area needed to cover a 3D object
Ray A line that has an endpoint and extends in one direction.
Radius The distance from the center of a circle to a point on the circle.
Created by: AnsleyMcCook
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