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In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square on the side subtending the obtuse angle is greater than the squares on the sides containing the obtuse angle, by twice the...

Elements of geometry, containing the first two (third and fourth) books of ... - Page 90
by Euclides - 1871
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Calendar

University of Cambridge - 1850 - 648 pages

...whose angles axe of give* magnitude. 2. In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square of the side suhtending the obtuse angle is greater than the squares of the sides containby the obtuse...

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Annual Report

1891 - 856 pages

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The Elements of Geometry: Or, The First Six Books, with the Eleventh and ...

Euclid - Euclid's Elements - 1859 - 254 pages

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