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A B and B C A B C A B D A B equal adjacent apothem arc A B bisect centre chord A B circ circumference cone construct the triangle convex surface Corollary cylinder decagon diameter distance divided dodecagon Eaton's equal altitudes equally distant equiangular equilateral equilateral polygon feet frustum given angle given circle given line given point given side given square half the arc hexagon homologous sides hypothenuse included angle infinite number inscribed internal angles intersection isosceles triangle line A B line joining measured by half number of sides opposite sides parallel planes parallelogram perimeter perpendicular plane parallel quadrilateral radii radius ratio rectangle regular polygon respectively equal rhombus right angles right pyramid right triangle Scholium secant segment similar triangles slant height sphere straight line tangent THEOREM XII trapezoid triangles ABC vertex
Pagina 25 - Four quantities are in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth.
Pagina 27 - If the product of two quantities is equal to the product of two others, the...
Pagina 43 - The area of a regular polygon is equal to half the product of its perimeter and apothem.
Pagina 11 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Pagina 23 - If two triangles have two sides of one respectively equal to two sides of the other, but the third sides unequal...
Pagina 20 - ... polygon, is equal to twice as many right angles as the polygon has sides minus two.
Pagina 49 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Pagina 70 - A right cylinder is a solid described by the revolution of a rectangle about one of its sides.