Geometry in the Grammar School: An Essay ...

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D. C. Heath, 1893 - Geometry - 52 pages
 

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Page 16 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Page 40 - CF ; which ivas to be proved. Cor. 1. The perpendicular is the shortest distance from a point to a line. Cor. 2. From a given point to a given straight line, only two equal straight lines can be drawn ; for, if there could be more, there would be at least two equal oblique lines OD the same side of the perpendicular ; which is impossible.
Page 43 - Two triangles are similar if two angles of one are equal respectively to two angles of the other.
Page 5 - COR. The area of a trapezoid is equal to the product of the median by the altitude.

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