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" If from the vertical angle of a triangle a straight line be drawn perpendicular to the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the perpendicular and the diameter of the circle... "
Elements of Geometry: Containing the First Six Books of Euclid: With a ... - Σελίδα 153
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Elements of Geometry: Containing the First Six Books of Euclid : with a ...

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...PROP. B. THEOR. If an angle of a triangle be bisected by a straight line, which likewise cuts the Lose; the rectangle contained by the sides of the triangle...segments of the base, together with the square of the stra ght line bisecting the angle. Let ABC be a triangle, and let the angle BAG be bisected by the...

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Geometrical Propositions Demonstrated, Or, a Supplement to Euclid: Being a ...

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