Trapezoid definition and properties
Math Open Reference
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Definition of Thales theorem - the diameter of a circle always subtends a right angle to any point on the circle.
Math Open Reference
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Definition and properties of a tetragon
Math Open Reference
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Definition and properties of pythagorean triples
Math Open Reference
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Pythagoras' Theorem
Math Open Reference
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Definition of the triangles of a polygon, including a formula to calculate the number of them in an n-gon
Math Open Reference
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The sides of a polygon are defined and two formulas for finding the side length for a regular polygon.
Math Open Reference
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Definition of a regular (equiangular) polygon
Math Open Reference
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The radius of a regular polygon and formula for finding it.
Math Open Reference
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Formula and description of the perimeter of a polygon.
Math Open Reference
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