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Download Point Line Plane Segment Congruent Similar Has no dimension and
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Point Has no dimension and undefined Line Extends without end in two directions Plane Extends in all directions on a flat surface Segment Part of a line that consists of two points, called endpoints Congruent A relationship between figures having the same shape and same size Similar Figures that are the same shape but not necessarily the same size Midpoint Part of a segment that divides or bisects it into two congruent segments Collinear Points that lie on the same line Coplanar Points that lie on the same plane Ray Part of a line that consists of a point, called initial point, and extends in one direction Angle Consists of two different rays (side) that have the same initial point (vertex) Acute angle An angle whose measure is greater than 0o and less than 90o Obtuse angle An angle whose measure is greater than 90o and less than 180o Right angle An angle whose measure is 90o Straight angle An angle whose measure is 180o Complementary angles Two angles who measures have a sum of 90o Supplementary angles Two angles who measures have a sum of 180o Adjacent angles Linear pair of angles Vertical angles Two angles that share a common vertex and side, but have no common interior points The two angles formed by the endpoint of a ray when the endpoint falls on a line (two adjacent angles whose non-common sides are opposite rays) The opposite angles formed by two intersecting lines
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