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Harlor Unit4

5th grade geometry

Line A set of points that form a straight path that extends infinitely in opposite directions.
Line segment A part of a line marked by two endpoints, and it includes the endpoints and all the points on the line between them.
Ray A part of a line that begins at an endpoint and extends infinitely in one direction.
Angle Formed by two rays sharing a common endpoint.
Parallel lines Lines that are equidistant (the same distance) from each other and in the same plane.
Perpendicular lines Lines that intersect to form a right angle.
Oblique lines Lines in the same plane that interesect to form nonright (acute or obtuse) angles.
Complementary angles Two angles are complementary if the sum of their measures is 90 degrees.
Supplementary Angles Two angles are supplementary if the sum of their measures is 180 degrees.
Congruent Figures that are the same size and shape.
Polygon A figure with 3 or more sides that has a closed shape, no tails and only one inside area.
Quadrilaterals A shape with four sides.
Acute angle An angle that is less than 90 degrees.
Obtuse angle An angle that is greater than 90 degrees and less than 180 degrees.
Right angle An angle that is 90 degrees.
Straight angle An angle that is 180 degrees.
Line of symmetry The fold line of a shape where both halves of the shape match exaclty.
Rotational symmetry When a figure can be turned less than 360 degrees around a point and be in the same orientation as it started.
Created by: jharlor