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" If two triangles have an angle of one equal to an angle of the other... "
Euclid's Elements of Geometry: The Six First Books. To which are Added ... - Page 172
by Euclid, Rev. John Allen - 1822 - 494 pages
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A School Geometry

Henry Sinclair Hall - Geometry - 1924 - 267 pages
...from (i) to (ii) assumes that if XY : AB - XZ : AC then XY:XZ=AB: AC. THEOREM XV. If two triangles have an angle of one equal to an angle of the other, and the sides containing the equal angles proportional, then the triangles are similar. Given. ABC,...
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Missouri School Journal, Volume 15

1898
...and prove theorem for the lateral area of a regular pyramid. 5. Two triangles having 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. HISTORY OF EDUCATION. 1. What were the characteristics...
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