Books  Books 1  1 of 1 on is equal to the product of its perimeter into the half of the perpendicular drawn.... 
is equal to the product of its perimeter into the half of the perpendicular drawn from the centre upon one of its sides ; hence the circle being considered as a polygon of a great number of sides, its area ought to equal the product of the circumference... Reflexions on the Metaphysical Principles of the Infinitesimal Analysis  Page 7 by Lazare Carnot  1832  132 pages Full view 
