Neither is it difficult to find the area of a circle mechanically. For the arp a of a circle being found by multiplying the circumference by the length of the radius, and dividing the product by 2 (page 127, 3dly), we need only pass a string around theanbsp;...

Title | : | An elementary treatise on geometry |

Author | : | Francis Joseph Grund |

Publisher | : | - 1834 |

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