 | 1877 - 470 pages
...lines he proportionals, the rectangle contained by the extremes is equal to the square on the mean ; and if the rectangle contained by the extremes be equal to the square on the mean, the three straight lines are proportionals. 2. Tangents to a parabola-at the ends... | |
 | University of Bombay - 1902 - 1102 pages
...lines be proportionals, the rectangle contained by the 13 extremes is equal to the square on the mean ; and if the rectangle contained by the extremes be equal to the square on the mean, the three straight lines are proportionals. Prove that the straight line bisecting... | |
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If four straight lines be proportionals, the rectangle contained by the extremes is equal to the rectangle contained by the means; And if the rectangle contained by the extremes be equal to the rectangle contained by the means, the four straight lines... 
