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ABCD altitude angles are equal apply approaches base bisects called centre chord circle circumference circumscribed coincide common cone construct contains corresponding cylinder describe diagonals diameter diedral angles difference distance divided draw drawn edges equal equivalent Exercise Exercise.—The extremities faces fall figure Find formed four frustum given given point GIVEN—the greater half Hence homologous hypotenuse included indefinitely inscribed intersection isosceles joining lateral area length less limit mean measured meet method middle point parallelogram parallelopiped passed perimeter perpendicular Place plane polygon prism proportional PROPOSITION PROVE pyramid radii radius ratio rectangle regular polygon respectively right angles right triangle segment sides similar sphere spherical square straight line surface symmetrical tangent THEOREM third triangle triangle ABC triangular unequal unit vertex vertices volume
Σελίδα 170 - The areas of two regular polygons of the same number of sides are to each other as the squares of their radii or as the squares of their apothems.
Σελίδα 106 - If a line divides two sides of a triangle proportionally, it is parallel to the third side.
Σελίδα 5 - If the first of three quantities is greater than the second, and the second is greater than the third, then the first is greater than the third.
Σελίδα 82 - An angle formed by a tangent and a chord is measured by one-half its intercepted arc.
Σελίδα 73 - A line perpendicular to a radius at its extremity is tangent to the circle.
Σελίδα 177 - C and area S. To PROVE S — ^RxC. Circumscribe a regular polygon and call its perimeter C' and area S'. Then S
Σελίδα 285 - Two triangles are congruent if (a) two sides and the included angle of one are equal, respectively, to two sides and the included angle of the other...
Σελίδα 45 - If, from a point within a triangle, two straight lines are drawn to the extremities of either side, their sum will be less than the sum of the other two sides of the triangle.