Mathematics: Compiled from the Best Authors and Intended to be the Text-book of the Course of Private Lectures on These Sciences in the University at Cambridge, Volume 2Printed at the University Press, by WilliamHilliard, 1801 - Mathematics |
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Results 1-5 of 36
Page 33
... Multiply the base by the perpendicular height , and half the product will be the area . RULE 2 . When the three sides only are given add the three sides together , and take half the sum ; from the half sum sub- tract each side ...
... Multiply the base by the perpendicular height , and half the product will be the area . RULE 2 . When the three sides only are given add the three sides together , and take half the sum ; from the half sum sub- tract each side ...
Page 38
... Multiply the sum of the two parallel sides by the per- pendicular distance between them , and half the product will be the area . EXAMPLES . * DEMONSTRATION . ABXDE DCX Bn The A ABD is = and the BCD = 2 2 DCX DE or ( because Bn DE ) ...
... Multiply the sum of the two parallel sides by the per- pendicular distance between them , and half the product will be the area . EXAMPLES . * DEMONSTRATION . ABXDE DCX Bn The A ABD is = and the BCD = 2 2 DCX DE or ( because Bn DE ) ...
Page 39
... Multiply the base by the perpendicular height , and half the product will be the area . RULE 2 . When the three sides only are given : -add the three sides together , and take half the sum ; from the half sum sub- tract each side ...
... Multiply the base by the perpendicular height , and half the product will be the area . RULE 2 . When the three sides only are given : -add the three sides together , and take half the sum ; from the half sum sub- tract each side ...
Page 39
... Multiply the sum of the two parallel sides by the per- pendicular distance between them , and half the product will be the area . EXAMPLES . * DEMONSTRATION . ABXDE DCX Bn The A ABD is = and the ABCD = 2 2 DCX DE or ( because Bn DE ) ...
... Multiply the sum of the two parallel sides by the per- pendicular distance between them , and half the product will be the area . EXAMPLES . * DEMONSTRATION . ABXDE DCX Bn The A ABD is = and the ABCD = 2 2 DCX DE or ( because Bn DE ) ...
Page 40
... sum of these per pendiculars being multiplied by the diagonal , half the prod- uct will be the area of the trapezium ... multiply * DEMONSTRATION . BEX DF The area of the triangle BDE is = BEXAC ; and the area of the triangle BAE is = 2 2 and ...
... sum of these per pendiculars being multiplied by the diagonal , half the prod- uct will be the area of the trapezium ... multiply * DEMONSTRATION . BEX DF The area of the triangle BDE is = BEXAC ; and the area of the triangle BAE is = 2 2 and ...
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Common terms and phrases
abscisses ADBA altitude angle answer axes axis azimuth base breadth bung diameter cask centre chord circumference cone conjugate cosine course curve declination departure dial diff difference of latitude difference of longitude distance divided draw drawn ecliptic ellipse equal equinoctial EXAMPLES feet figure find the area find the solidity frustum given head diameter height Hence horizon hour angle hour lines hyperbola hypotenuse intersection latit measure meridian middle latitude miles multiply the sum NOTE oblique circle opposite ordinate parabola parallel of latitude parallel sailing parallelogram perpendicular plane sailing pole primitive PROBLEM PROBLEM projection proportion quadrant radius rectangle Required the area Required the content right ascension right line RULE secant segment side sphere spherical triangle spindle square star station stile subtract sun's tance tang tangent THEOREM transverse trapezium triangle ABC ullage wine gallons yards
Popular passages
Page 21 - As the base or sum of the segments Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Page 17 - To find the other side: — as the sum of the two given sides is to their difference, so is the tangent of half the sum of their opposite angles to the tangent of half their difference...
Page 83 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 328 - The conjugate to any diameter is the line drawn through the centre, and parallel to the tangent of the curve at the vertex of the diameter. So...
Page 28 - But if the hypothenuse be made radius -, then each leg "will represent the sine of its opposite angle ; namely, the leg AB the sine of the arc AE or angle c, and the leg BC the sine of the arc CD or angle A.
Page 83 - The axis of a solid is a line drawn from the middle of one end to the middle of the opposite end ; as between the opposite ends of a prism.
Page 83 - The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed.
Page 130 - Between these, in a right line, stands an ancient statue, the head whereof is 97 feet from the summit of the higher, and 86 feet from the top of the lower column, and the distance between the...
Page 205 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 38 - Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area.