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A B D adjacent altitude base bisect Book called centre chord circle circumference coincide cone construct the triangle Converse convex surface Corollary cylinder DEFINITIONS demonstration describe diagonals diameter difference direction distance divided draw drawn equal equiangular equilateral equivalent extremities faces feet figure formed four frustum given angle given line given point given side greater half hexagon included angle infinite inscribed internal angles intersection isosceles triangle less lines A B mean measured meet middle multiplied opposite sides parallel parallel planes parallelogram passing perimeter perpendicular plane plane parallel prism PROBLEM proportion propositions proved pyramid quadrilateral quantities radii radius ratio rectangle regular polygon respectively equal right angles right triangle segment sides similar sphere square straight line tangent THEOREM third trapezoid triangle triangle A B C vertex volume whole
Σελίδα 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.
Σελίδα 27 - If the product of two quantities is equal to the product of two others, the...
Σελίδα 43 - The area of a regular polygon is equal to half the product of its perimeter and apothem.
Σελίδα 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.
Σελίδα 23 - If two triangles have two sides of one respectively equal to two sides of the other, but the third sides unequal...
Σελίδα 20 - ... polygon, is equal to twice as many right angles as the polygon has sides minus two.
Σελίδα 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.
Σελίδα 70 - A right cylinder is a solid described by the revolution of a rectangle about one of its sides.