Geometry, The branch of mathematics that deals with shapes, angles, dimensions and sizes of a variety of things we see in everyday life, Point, An exact location in space, Line, A collection of points along a straight path that extends endlessly in both directions., Line segment, A part of a line having two endpoints., Ray, A part of the line segment that has only one endpoint., Parallel lines, Lines that do not intersect or meet each other at any point in a plane, Perpendicular lines, Formed when two lines meet each other at the right angle or 90 degrees., Intersecting lines, Two or more lines that share exactly one common point, Transversal, A line intersecting two or more given lines in a plane at different points., Angles, When two rays combine with a common endpoint, Vertex, The point where the arms of an angle meet, Right Angle, An angle whose measure is ninety degrees (90°), Acute Angle, An angle whose measure is more than zero degrees 0° and less than ninety degrees 90°, Obtuse Angle, An angle whose measure is more than ninety degrees (90°) and less than one hundred and eighty degrees (180°), Straight Angle, The angle if the arms of the angle are in an opposite direction to each other.

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