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الصفحة 28 - If two triangles have two sides of the one equal to two sides of the...
الصفحة 100 - The area of a triangle is equal to half the product of its base by its altitude.
الصفحة 99 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
الصفحة 59 - A chord is a straight line joining the extremities of an arc.
الصفحة 124 - If two polygons are composed of the same number of triangles, similar each to each and similarly placed, the polygons are similar.
الصفحة 214 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
الصفحة 43 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
الصفحة 52 - If the product of two quantities is equal to the product of two other quantities, two of them may be made the extremes, and the other two the means of a proportion.
الصفحة 123 - Similar triangles are to each other as the squares of their homologous sides.
الصفحة 182 - The upper end of the frustum of a pyramid or cone is called the upper base...

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