Lessons on Form: Or, An Introduction to Geometry, as Given in a Pestalozzian School, Cheam, Surrey

Εξώφυλλο
Taylor and Walton, 1837 - 215 σελίδες
 

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Δημοφιλή αποσπάσματα

Σελίδα 98 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Σελίδα 134 - 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 rectangle contained by the side...
Σελίδα 137 - In every triangle, the square of the side subtending either of the acute angles is less than the squares of the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle.

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