A new supplement to Euclid's Elements of geometry, by the author of 'A new introduction to the mathematics'.

Voorkant
Whittaker & Company, 1840 - 84 pagina's
 

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Pagina 62 - Similar triangles are to one another in the duplicate ratio of their homologous sides.
Pagina 5 - The areas of two similar triangles are to one another as the squares of their homologous or similarly situated sides (fig.
Pagina 41 - PROP. XV. THEOR. Magnitudes have the same ratio to one another which their equimultiples have. Let AB be the same multiple of C, that DE is of F: C shall be to F, as AB to DE.
Pagina 63 - Ratios that are the same to the same ratio, are the same to one another.
Pagina 39 - F is of B, and that magnitudes have the same ratio to one another which their equimultiples have; (v.
Pagina 13 - PQ the given straight line, and A the given point in it. It Is required to describe a circle to touch ihe 0 DEB, and also to touch PQ at A.
Pagina 56 - In any triangle the square on a side opposite to an acute angle is less than the sum of the squares on the sides which contain the acute angle ; (e}. In an obtuse-angled triangle the square on the side subtending the obtuse angle is greater than the sum of the squares on the sides containing...
Pagina 57 - PROPOSITION 20. In a circle the angle at the centre is double of the angle at the circumference, when the angles have the same circumference as base.
Pagina 63 - CE equal to the ratio of the square of AB to the square of AD.
Pagina 61 - And in continued proportions, the square of the mean is equal to the rectangle contained by the extremes.

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