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# math w/Annabeth

### Math terms and their definitions: geometry

TermDefinition
Line A length that goes in two opposite directions without end
Ray Has one endpoint and goes without end in one direction
Line Segment A part of line with two endpoints
Plane A flat surface that extends without end
Parallel Lines Lines that never meet
Intersecting Lines Lines that meet at a point
Angle Formed by two rays with the same endpoint
Vertex Point of intersection of the sides of an angle
Protracter Tool to measure and draw angles
Degrees Unit of measure for angles
Right Angle Measures exactly 90 degrees
Acute Angle Less than 90 degrees
Obtuse Angle More than 90 degrees
Straight Angle Measures exactly 180 degrees, a straight line
Complementary Angles Add up to 90 degrees
Supplementary Angles Add up to 180 degrees
Vertical Angles Angles opposite each other when two lines intersect
Created by: studystack86713