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Geometry
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Acute Angle
adjacent
Equilateral Triangle
Hexagon
Isosceles Triangle
Line
Line Segment
octagon
Obtuse Angle
Parallelogram
Parallel lines
pentagon
Perpendicular
polygon
Quadrilateral
Ray
rectangle
Right Angle
rombus
Scalene triangle
square
trapizoid
Vertex
Right Angle
An angle that is measured 90 degreese.
noun
Middle English