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Lines & Angles
2022-2023
Term | Definition |
---|---|
line | no bends and extends in both directions indefinitely |
line segment | a piece or part of a line that has two endpoints |
point | an exact position or location |
ray | has a beginning point and goes indefinitely in only one direction |
angle | the figure, in which two rays meet at a common point called the vertex |
perpendicular lines | two lines that meet or intersect each other at right angles (90°) |
parallel lines | two or more lines that lie in the same plane and never intersect each other |
acute angle | angles that measure less than 90 degrees |
obtuse angle | angles that measure more than 90 degrees |
right angle | angles that measure exactly 90 degrees |
straight angle | angles that measure 180 degrees |
symmetry | when two or more parts are identical after a flip, slide or turn |
two dimensional figure | a flat figure or a shape that has two dimensions—length and width |