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4.G.1 Vocabulary

TermDefinition
Obtuse Angle An angle with a measure of greater than 90 degrees but less than 180 degrees.
Obtuse Triangle A triangle with one obtuse angle.
Acute Angle An angle with a measure of greater than zero degrees but less than 90 degrees.
Acute Triangle A triangle with one acute angle.
Endpoint The point at the beginning of a ray or line segment.
Intersecting Lines Lines that cross or meet each other.
Line A straight set of points that extend forever in opposite directions.
Line Segment Part of a line between 2 endpoints.
Ray Part of a line that has one endpoint and goes on forever in one direction.
Parallel Lines that are always the same distance apart and will never cross.
Perpendicular Lines that cross or meet to form right angles.
Point An exact location on a line represented by a dot.
Right Angle An angle with a measure of exactly 90 degrees.
Right Triangle A triangle with one 90 degree (right) angle.
Created by: elizabeth_o
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