A Course of Mathematics: In Two Volumes. Composed for the Use of the Royal Military Academy, Volume 1Longman, Orme & Company, 1841 - Mathematics |
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Page 373
... parallel to the base CE . Geom . th . 82 . Second method . Draw any line DC , meeting AB in C , and with centres C ... ruler and the parallel scales . A brief description of them is annexed . 1. The parallel ruler . It has been proved ...
... parallel to the base CE . Geom . th . 82 . Second method . Draw any line DC , meeting AB in C , and with centres C ... ruler and the parallel scales . A brief description of them is annexed . 1. The parallel ruler . It has been proved ...
Page 374
... parallel , and whilst held in this position , the ruler BE is placed against the hypothenuse GK . The ruler being held in this position , the triangle is slid with the right hand , up or down , as the case may require , till the edge GH ...
... parallel , and whilst held in this position , the ruler BE is placed against the hypothenuse GK . The ruler being held in this position , the triangle is slid with the right hand , up or down , as the case may require , till the edge GH ...
Page 375
... parallel to the ends DG , HE . The edge of the ruler is placed to coincide with the given line AB , and its middle point with the point C : then the opposite end of CF being marked on the paper , the scale is removed and CF drawn ...
... parallel to the ends DG , HE . The edge of the ruler is placed to coincide with the given line AB , and its middle point with the point C : then the opposite end of CF being marked on the paper , the scale is removed and CF drawn ...
Page 376
... parallel ruler . PROBLEM VI . From a given point A without a given line BC to draw a perpendicular to BC . First method . With centre A , and any convenient radius AD , describe a circle cutting BC in two points D and E ; and from D and ...
... parallel ruler . PROBLEM VI . From a given point A without a given line BC to draw a perpendicular to BC . First method . With centre A , and any convenient radius AD , describe a circle cutting BC in two points D and E ; and from D and ...
Page 377
... parallel to this perpendicular . It will be that required . A very accurate rectangular ruler may be made by doubling a piece of stiff paper , ABCD , so as to obtain a straight line EF ; and then carefully doubling again in GH , so that ...
... parallel to this perpendicular . It will be that required . A very accurate rectangular ruler may be made by doubling a piece of stiff paper , ABCD , so as to obtain a straight line EF ; and then carefully doubling again in GH , so that ...
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Common terms and phrases
ABCD algebraic altitude arithmetical arithmetical progression base bisect breadth centre chord circle circumference coefficients common cone cosec cube root decimal denominator denoted diagonal diameter difference dihedral angle distance divided divisor draw drawn equal equation equiangular EXAMPLES expression figure fraction frustum geometrical given line greater hence inscribed integer intersection join length less lineation logarithms mantissa measure meeting method multiplied parallel parallel ruler parallelogram perpendicular plane polygon prism PROBLEM proportional quantity quotient radii radius ratio rectangle Reduce right angles rule Scholium segment sides sine solid angle solution square root straight line subtraction tangent THEOREM third trapezium triangle ABC u₁ vulgar fraction Whence