Geometrical Problems Deducible from the First Six Books of Euclid: Arranged and Solved: to which is Added an Appendix Containing the Elements of Plane Trigonometry ...

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J. Smith, 1827 - 377 σελίδες

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If any number of equal straight lines be placed in a circle
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From the circumference of a given circle to draw to a straight
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of intersection a circle be described cutting them the points where
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cumferences the lines joining the points of intersection and
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other extremity of the diameter the part without the circle may
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being in the circumference of the other and any line be drawn from
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line which shall make with the circumference an angle less than
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be drawn perpendicular to the base and from the greater segment
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to meet the tangents drawn from the extremities of the bisecting line
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from the points of intersection and produced to the circumference
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which are perpendicular to each other in such a manner that
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the whole line and one of the parts as diameters semicircles
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From a given point in the diameter of a semicircle produced
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the other two sides
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drawn to the opposite sides making equal angles with the base
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If two exterior angles of a triangle be bisected and from
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The three straight lines which bisect the three angles
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secting that which joins the vertex and the bisection of the base
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If the opposite sides or opposite angles of a quadrilateral
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of any four lines which can be drawn to the four angles from
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sides which are not parallel the sum of the parallel sides will have
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perpendiculars be let fall on every side the sum of the squares
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triangle and the extremities of the adjacent sides be joined
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If from each of the angles of any triangle a line be drawn
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Σελίδα 10 - IF a straight line be divided into two equal, and also into two unequal parts ; the squares of the two unequal parts are together double of the square of half the line, and of the square of the line between the points of section.
Σελίδα xv - IF from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle,. shall be equal to the square of the line which touches it.
Σελίδα xxx - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.
Σελίδα 303 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Σελίδα 140 - Iff a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other...
Σελίδα 329 - CE is equal to the difference of the segments of the base made by the perpendicular.
Σελίδα 109 - If from a point, without a parallelogram, there be drawn two straight lines to the extremities of the two opposite sides, between which, when produced, the point does not lie, the difference of the triangles thus formed is equal to half the parallelogram. Ex. 2. The two triangles, formed by drawing straight lines from any point within a parallelogram to the extremities of its opposite sides, are together half of the parallelogram.
Σελίδα 164 - PROPOSITION I. PROBLEM. — To describe an equilateral triangle upon a given finite straight line. Let AB be the given straight line; it is required to describe an equilateral triangle upon it.
Σελίδα 281 - Given the vertical angle, the difference of the two sides containing it, and the difference of the segments of the base made by a perpendicular from the vertex ; construct the triangle.
Σελίδα 270 - AB describe a segment of a circle containing an angle equal to the given angle, (in.

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