A Compendious Course of Practical Mathematics: Particularly Adapted to the Use of the Gentlemen of the Army and Navy ...

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H. Woodfall, 1769 - Mathematics
 

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Page 12 - If two angles of one triangle are equal to two angles of another triangle, the third angles are equal, and the triangles are mutually equiangular.
Page 67 - At present it is divided into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds.
Page 82 - But if it be a mixed number ; reduce it to an improper fraction, and find the difference of the logarithms of the numerator and denominator, in the same manner as before.
Page 47 - E, cannot be found, then it can only be said that the ratio of A to C is compounded of the ratios of A to B, and B to C, that is, of the given ratios of D to E, and F to G. PROP.
Page 213 - Now, if this Ball flew in the Curve of a Parabola, its horizontal Range, at 45°, would be found, by the fifth Poftulate, to be about 17 Miles.
Page 91 - TN a plain triangle, the fum of any two fules is to their difference, as the tangent of half the fum of the angles at the bafe, to the tangent of half their difference.
Page 30 - A reftilineal figure is faid to be defcribed about a circle, when each fide of the circumfcribed figure touches the circumference of the circle. V. In like manner a circle is fai.d to be infcribed in a rectilineal figure...
Page 75 - Aferies of quantities are fold to be in geometrical prtgrejpon, when the firft has the fame ratio to the fecond, as the fecond to the third, and as the third to the fourth, &c.
Page 35 - The angles DEG, GEF, DFH, and HFE, being the halves of the angles DEF; and DFE, each of which is double to the angle EDF, are equal to the angle EDF ; and confequently the five arches upon which they reft, are equal, (by 21.
Page 45 - If all the angles of the triangle ABC are equal to the angles of the triangle EDF, that is, if the angle A be equal Fig.

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