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Examples of Square and Triangle

How can you obtain the equations of triangle or square? If you allow me to use absolute function |x|, I can give you the explicit forms. A triangle is given by

equation8

A square is given by

  equation13

I will use the expression (called normal) in which the distance of each side from the center point equals to 1 in the following text. E.g. the normal expression of equation (2) is given by

equation17


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Next: The equation of n-gon Up: Plane figure equations Previous: Plane figure equations

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