# ELEMENTS OF GEOMETRY AND TRIGONOMETRY

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Side 28 - If two triangles have two sides of the one equal to two sides of the...
Side 100 - The area of a triangle is equal to half the product of its base by its altitude.
Side 99 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
Side 59 - A chord is a straight line joining the extremities of an arc.
Side 124 - If two polygons are composed of the same number of triangles, similar each to each and similarly placed, the polygons are similar.
Side 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.
Side 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.
Side 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.
Side 123 - Similar triangles are to each other as the squares of their homologous sides.
Side 182 - The upper end of the frustum of a pyramid or cone is called the upper base...