Elements of Geometry and Plane Trigonometry: With an Appendix, and Copious Notes and IllustrationsA. Constable & Company, 1817 - 432 páginas |
Dentro del libro
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Página 264
... station B , with an horizontal line , and also the distance BC of a perpendicular AC , to find that perpendicular , and the hy- potenusal or aërial distance BA . In the right - angled triangle BCA , the radius is to the tan- B gent of ...
... station B , with an horizontal line , and also the distance BC of a perpendicular AC , to find that perpendicular , and the hy- potenusal or aërial distance BA . In the right - angled triangle BCA , the radius is to the tan- B gent of ...
Página 265
... stations , and the direction of an object viewed from them , to find its distance from each . Let BC be given , with the ... station B be right , and that at C half a right angle , the distance AB will be equal to the base BC . PROP . XX ...
... stations , and the direction of an object viewed from them , to find its distance from each . Let BC be given , with the ... station B be right , and that at C half a right angle , the distance AB will be equal to the base BC . PROP . XX ...
Página 266
... station and the angle which they subtend , to find their mutual distance . Let AC , BC , and the angle ACB be given ... stations , between which the communication is in- terrupted . Thus let A be visible from B and C , though the ...
... station and the angle which they subtend , to find their mutual distance . Let AC , BC , and the angle ACB be given ... stations , between which the communication is in- terrupted . Thus let A be visible from B and C , though the ...
Página 267
... stations from which these are observed ; the in- terval or base CD being measured , and also the angles CDA , CDB at the first station , and DCA , DCB at the second ; it is thence required to determine the transverse distance AB , and ...
... stations from which these are observed ; the in- terval or base CD being measured , and also the angles CDA , CDB at the first station , and DCA , DCB at the second ; it is thence required to determine the transverse distance AB , and ...
Página 268
... station . Cor . Hence the converse of this problem is readily sol- ved . Suppose two remote objects A and B , of which the mutual distance is already known , are observed from the stations C and D , and it were thence required to deter ...
... station . Cor . Hence the converse of this problem is readily sol- ved . Suppose two remote objects A and B , of which the mutual distance is already known , are observed from the stations C and D , and it were thence required to deter ...
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Elements of Geometry, and Plane Trigonometry: With an Appendix, and Very ... University Professor Emeritus John Leslie, Sir Sin vista previa disponible - 2016 |
Términos y frases comunes
ABCD adjacent angle altitude angle ABC angle ADB angle BAC base AC bisect centre chord circle circumference consequently construction contained angle cosine decagon denote describe diameter difference distance diverging lines divided draw equal to BC equilateral triangle equivalent to twice evidently exterior angle given greater half Hence hypotenuse inscribed isosceles triangle join let fall likewise measure parallel perpendicular point G polygon PROB PROP Proposition quadrilateral figure quantities radius ratio rectangle rectangle contained rectilineal figure rhomboid right angles right-angled triangle Scholium segments semicircle semiperimeter side AC sides AB sine square of AC squares of AB straight line tangent THEOR tion triangle ABC twice the rectangle twice the square vertex vertical angle whence Wherefore
Pasajes populares
Página 30 - ... if a straight line, &c. QED PROPOSITION 29. — Theorem. If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another ; and the exterior angle equal to the interior and opposite upon the same side ; and likewise the two interior angles upon the same side together equal to two right angles.
Página 333 - The first of four magnitudes is said to have the same ratio to the second which the third has to the fourth, when any...
Página 294 - If a straight line meets two straight lines, so as to " make the two interior angles on the same side of it taken " together less than two right angles...
Página 10 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 137 - Componendo, by composition ; when there are four proportionals, and it is inferred that the first together with the second, is to the second, as the third together with the fourth, is to the fourth.
Página 84 - The angle at the centre of a circle is double of the angle at the circumference upon the same base, that is, upon the same part of the circumference.
Página 292 - Thus, for" example, he to whom the geometrical proposition, that the angles of a triangle are together equal to two right angles...
Página 93 - UPON a given straight line to describe a segment of a circle containing an angle equal to a given rectilineal angle.
Página 38 - 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.
Página 58 - The rectangle contained by the sum and difference of two straight lines is equivalent to the difference of the squares of these lines.