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" The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C'... "
First Part of an Elementary Treatise on Spherical Trigonometry - Page 69
by Benjamin Peirce - 1836 - 71 pages
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Examination,Midsummer,1879

Education Department - 1879 - 1136 pages
...by drawing lines parallel to the sides from any point in the cutting line. 9. Equal triangles which have an angle of the one equal to an angle of the other have their sides about the equal angles reciprocally proportional. CD, AB are parallel chords in a...
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Information Relative to the Appointment and Admission of Cadets to the ...

Military Academy, West Point - 26 pages
...the segment subtended by the side of a regular hexagon. 8. Theorem : The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides, Including those angles. 9. Problem : Through a given...
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