A Course of Mathematics: In Three Volumes : Composed for the Use of the Royal Military Academy ...F.C. & J. Rivington, 1811 - Mathematics |
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Page 8
... yards Given BC 232 yards LA 37 ° 20 ′ Required the other parts . 1. Geometrically . Draw an indefinite line ; on which set off AB = 345 , from some convenient scale of equal parts . - Make the angle A = 37 ° . — With a radius of 232 ...
... yards Given BC 232 yards LA 37 ° 20 ′ Required the other parts . 1. Geometrically . Draw an indefinite line ; on which set off AB = 345 , from some convenient scale of equal parts . - Make the angle A = 37 ° . — With a radius of 232 ...
Page 11
... yards Given AC 174-07 yards A 37 ° 20 ' Required the other parts . 1. Geometrically . Draw AB 345 from a scale of equal parts . Make the angle △ = 37 ° 20 ' . Set off AC 174 by the scale of equal parts . Join BC , and it is done . Then ...
... yards Given AC 174-07 yards A 37 ° 20 ' Required the other parts . 1. Geometrically . Draw AB 345 from a scale of equal parts . Make the angle △ = 37 ° 20 ' . Set off AC 174 by the scale of equal parts . Join BC , and it is done . Then ...
Page 12
... yards Given { BC 112 yards BC 309.86 Ans . B 24 ° 45 ' < C 98 3 Ans . { AB 112.6 A 57 ° 28 ZB 64 35 4 C 57 ° 57 ' Required the other parts . THEOREM III . When the Three Sides of a Triangle are given . First , let fall a perpendicular ...
... yards Given { BC 112 yards BC 309.86 Ans . B 24 ° 45 ' < C 98 3 Ans . { AB 112.6 A 57 ° 28 ZB 64 35 4 C 57 ° 57 ' Required the other parts . THEOREM III . When the Three Sides of a Triangle are given . First , let fall a perpendicular ...
Page 13
... yards AC 232 the sides BC 174.07 To find the angles . 1. Geometrically . Draw the base AB = 345 by a scale of equal parts . With radius 232 , and centre A , describe an arc ; and with radius 174 , and centre B , describe another arc ...
... yards AC 232 the sides BC 174.07 To find the angles . 1. Geometrically . Draw the base AB = 345 by a scale of equal parts . With radius 232 , and centre A , describe an arc ; and with radius 174 , and centre B , describe another arc ...
Page 17
... yard . But inaccessible lines must be measured by taking angles , or by such - like method , drawn from the principles of geometry . When instruments are used for taking the magnitude of the angles in degrees , the lines are then ...
... yard . But inaccessible lines must be measured by taking angles , or by such - like method , drawn from the principles of geometry . When instruments are used for taking the magnitude of the angles in degrees , the lines are then ...
Common terms and phrases
16 feet absciss altitude axis ball base beam body breadth CA² CD² centre of gravity circle circular segment circumference column cone constant Corol Cosine Cotang cube cubic cubic foot curve cylinder DE² denote density descending diameter direction distance divided draw drawn ellipse equal equation figure find the area find the fluent fluent of EXAM fluid foot force frustum given fluxion Hence hyperbola inches inclined plane length lever logarithms measure motion moving multiply nearly ordinate parabola parallel parallelogram pendulum perpendicular pressure PROBLEM proportional PROPOSITION quantity QUEST radius ratio rectangle resistance right angles rule SCHOLIUM segment side sine solid space specific gravity square supposing surface Tang tangent theor THEOREM theref trapezium triangle variable velocity vibration weight whole yards
Popular passages
Page 52 - 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 1 - Geom.) is an arc of any circle contained between the two lines which form that angle, the angular point being the centre ; and it is estimated by the number of degrees contained in that arc.
Page 79 - A diameter is any right line, as AB or DE, drawn through the centre, and terminated on each side by the curve ; and the extremities of the diameter, or its intersections with the curve, are its vertices. Hence all the diameters of a parabola are parallel to the axi?, and infinite in length.
Page 23 - Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible hill, there were measured, the angle of elevation of the top of the hill 40°, and of the top of the tower 51° ; then measuring in a direct line 180 feet farther from the hill, the angle of elevation of the top of the tower was 33° 45' ; required the height of the tower.
Page 245 - May-pole, whose top was broken off" by a blast of wind, struck the ground at the distance of 15 feet from the foot of the pole ; what was the height of the whole May-pole, supposing the length of the broken piece to be 39 feet ?
Page 250 - Then say, As the weight lost in water, Is to the whole weight> So is the specific gravity of water, To the specific gravity of the body.
Page 263 - It is determined, we find, as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London.
Page 27 - To find the area of a parallelogram, the length being 12-25, and height 8-5. 12-25 length 8'5 breadth 6125 9800 104-125 area . Ex. 2. To find the area of a square, whose side is 35'25 chains. Ans. 124 acres, 1 rood, 1 perch.
Page 72 - ARTIFICERS' WORK. ARTIFICERS compute the contents of their works by several different measures. As, Glazing and masonry, by the foot ; Painting, plastering, paving, &c, by the yard, of 9 square feet : Flooring, partitioning, roofing, tiling, &c, by the square of 100 - square feet : And brickwork...
Page 72 - ... the whole length of the upper part of the hand-rail, and girt over its end till it meet the top of the...