The Elements of Euclid; viz. the first six books, together with the eleventh and twelfth. Also the book of Euclid's Data. By R. Simson. To which is added, A treatise on the construction of the trigonometrical canon [by J. Christison] and A concise account of logarithms [by A. Robertson]. |
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Side 477
Let ABC be a plane triangle , the sum of any two sides AB , AC will be to their
difference as the tangent of half the sum of the angles at the base ABC , ACB to
the tangent of half their difference . About A as a centre , with AB the greater side
for ...
Let ABC be a plane triangle , the sum of any two sides AB , AC will be to their
difference as the tangent of half the sum of the angles at the base ABC , ACB to
the tangent of half their difference . About A as a centre , with AB the greater side
for ...
Side 478
Euclides Robert Simson. the tangent of half the sum of the angles at the base , to
the tangent of half their difference . PROP . IV . FIG . 18 . In any plane triangle
BAC , whose two sides are BA , AC , and base BC , the less of the two sides ,
which ...
Euclides Robert Simson. the tangent of half the sum of the angles at the base , to
the tangent of half their difference . PROP . IV . FIG . 18 . In any plane triangle
BAC , whose two sides are BA , AC , and base BC , the less of the two sides ,
which ...
Side 481
the difference of the sides ; and since AD is perpendicular to GC , GD , CD will be
equal ; consequently GB will be - equal to the sum or difference of the segments
CD , BD , * according as the perpendicular AD meets the base produced , or the ...
the difference of the sides ; and since AD is perpendicular to GC , GD , CD will be
equal ; consequently GB will be - equal to the sum or difference of the segments
CD , BD , * according as the perpendicular AD meets the base produced , or the ...
Side 488
But because FO = EO , then will FM = MG = ON ; and so OP + FM - FI = sine of the
sum of the arcs : And OP - FM : that is , OP - ON = EL = sine of the difference of
the arcs : which were to be found . Cor . Because the differences of the arcs BE ...
But because FO = EO , then will FM = MG = ON ; and so OP + FM - FI = sine of the
sum of the arcs : And OP - FM : that is , OP - ON = EL = sine of the difference of
the arcs : which were to be found . Cor . Because the differences of the arcs BE ...
Side 488
radius is to double the cosine of 15 degrees , as the sine of I degree is to the
difference of the sines of 14 degrees , and 16 degrees : So , also , is the sine of 3
degrees to the differ : ence between the sines of 12 and 18 degrees ; and so on ...
radius is to double the cosine of 15 degrees , as the sine of I degree is to the
difference of the sines of 14 degrees , and 16 degrees : So , also , is the sine of 3
degrees to the differ : ence between the sines of 12 and 18 degrees ; and so on ...
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The Elements of Euclid; viz. the first six books, together with the eleventh ... Euclides Uten tilgangsbegrensning - 1834 |
Vanlige uttrykk og setninger
added altitude angle ABC angle BAC base Book centre circle circle ABCD circumference common cone contained cylinder definition demonstrated described diameter difference divided double draw drawn equal equal angles equiangular equimultiples excess figure fore four fourth given angle given in position given in species given magnitude given ratio given straight line greater Greek half join less likewise logarithm magnitude manner meet multiple opposite parallel parallelogram pass perpendicular plane prism produced PROP proportionals proposition pyramid radius reason rectangle rectangle contained remaining right angles segment shown sides similar sine solid solid angle sphere square square of AC Take taken THEOR third triangle ABC wherefore whole
Populære avsnitt
Side 43 - IF a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Side 20 - Any two sides of a triangle are together greater than the third side.
Side 30 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 20 - If, from the ends of the side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than, the other two sides of the triangle, but shall contain a greater angle. Let...
Side 306 - Again ; the mathematical postulate, that " things which are equal to the same are equal to one another," is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Side 8 - DL is equal to DG, and DA, DB, parts of them, are equal ; therefore the remainder AL is equal to the remainder (3. Ax.) BG : But it has been shewn that BC is equal to BG ; wherefore AL and BC are each of them equal to BG ; and things that are equal to the same are equal to one another ; therefore the straight line AL is equal to BC.
Side 153 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Side 52 - To divide a given straight line into two parts, so that the rectangle contained by the whole, and one of the parts, may be equal to the square of the other part.
Side 3 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Side 165 - SIMILAR triangles are to one another in the duplicate ratio of their homologous sides.