​Congruent: same size, shape and measure

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Endpoints: points where a line segments ends

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​Ray- A line that starts at a point and extends infinitely

​Vertex: the point of an angle where the two rays meet

​Plane: A flat surface (Think of the plains out west. They're flat)

​Acute: Angle between 0 and 90 degrees

​Supplementary Angles: The sum of two angles is 180 degrees

​Line: An infinite length of points

​Obtuse- Angle between 90 and 180 degrees

​113 degrees

​Perpendicular: when two lines intersect at 90 degree angles