If the angles be all equal among themselves, the polygon is said to be a regular one ; otherwise it is irregular. ... Dodecagon, Therefore to find the area of any regular polygon not exceeding 12 sides, square the side, and multiply that square byanbsp;...

Title | : | A Dictionary of Mechanical Science, Arts, Manufactures, and Miscellaneous Knowledge |

Author | : | Alexander Jamieson |

Publisher | : | - 1829 |

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