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 ...J. Smith, 1819 - 377 σελίδες |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα 5
... Al = AF and AF = AE , therefore AI = AE , i . e . a line more remote is equal to one nearer the perpendi ... AC : CD in the given ratio ; join BD , and through C draw ECF perpendicular to BD . ECF is the line required . | B Draw AE parallel ...
... Al = AF and AF = AE , therefore AI = AE , i . e . a line more remote is equal to one nearer the perpendi ... AC : CD in the given ratio ; join BD , and through C draw ECF perpendicular to BD . ECF is the line required . | B Draw AE parallel ...
Σελίδα 6
... parallel to AC one of the lines , and make DE = DA . Join EP and produce it to F , then will EF be bisected in P .. A D E For since DP is parallel to AF , ( Eucl . vi . 2. ) EP : PF :: ED : DA , i . e . in a ratio of equality . COR . If ...
... parallel to AC one of the lines , and make DE = DA . Join EP and produce it to F , then will EF be bisected in P .. A D E For since DP is parallel to AF , ( Eucl . vi . 2. ) EP : PF :: ED : DA , i . e . in a ratio of equality . COR . If ...
Σελίδα 7
... AC , and from P draw PDE parallel to AC . PDE is the line required . D P Σ For since DE is parallel to AC , ( Eucl . vi . 2. ) DB : BE :: AB : BC , i . e . in the given ratio . ( 12. ) If from a given point any number of straight lines ...
... AC , and from P draw PDE parallel to AC . PDE is the line required . D P Σ For since DE is parallel to AC , ( Eucl . vi . 2. ) DB : BE :: AB : BC , i . e . in the given ratio . ( 12. ) If from a given point any number of straight lines ...
Σελίδα 9
... parallel and equal to FI , IK , and .. in the given ratio . ( 15. ) If three straight lines drawn from the same ... AC :: AC : AD , and from A let AE be drawn equal to AC , inclined at any angle to AB ; join EB , EC , ED ; the angle BEC ...
... parallel and equal to FI , IK , and .. in the given ratio . ( 15. ) If three straight lines drawn from the same ... AC :: AC : AD , and from A let AE be drawn equal to AC , inclined at any angle to AB ; join EB , EC , ED ; the angle BEC ...
Σελίδα 11
... AC be any other indefinite straight line making any angle with AB , and in it take any point D , and take as many ... parallel to BC ; and therefore parallel to each other ; and draw DK parallel to AB . B C Then because GD is parallel to ...
... AC be any other indefinite straight line making any angle with AB , and in it take any point D , and take as many ... parallel to BC ; and therefore parallel to each other ; and draw DK parallel to AB . B C Then because GD is parallel to ...
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD angle ABC base bisects the angle centre chord circle ABC circles cut circles touch circumference describe a circle divided draw any line drawn parallel duplicate ratio equal angles equiangular Eucl extremities given angle given circle given in position given line given point given ratio given straight line given triangle inscribed intercepted isosceles triangle Join AE Join BD Let AB Let ABC let fall line given line joining line required lines be drawn lines drawn mean proportional opposite side parallel to BC parallelogram pendicular perpendicular be drawn point of bisection point of contact point of intersection quadrant radius rectangle contained right angles right-angled triangle segments semicircle shewn tangent touches the circle trapezium triangle ABC vertex vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 124 - If a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those sides produced, proportionally; and if the sides, or the sides produced, be cut proportionally, the straight '.line which joint the points of section, shall be parallel to the remaining side of the triangle.
Σελίδα xiii - 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 158 - 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 160 - Upon a given straight line, to describe a segment of a circle, containing an angle equal to a given angle. Let AB be the given straight line, and C the given angle ; it is required to.
Σελίδα 230 - To describe an isosceles triangle, having each of the angles at the base double of the third angle.
Σελίδα 157 - 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 33 - FC ; (ax. 1.) and FA, FB, FC are equal to one another : wherefore the circle described from the centre F, at the distance of one of them, will pass through the extremities of the other two, and be described about the triangle ABC.
Σελίδα xxv - ... the squares of the diagonals, is equal to the sum of the squares of the bisected sides together with four times the square of the line joining those points of bisection.
Σελίδα 248 - If an equilateral triangle be inscribed in a circle, and the adjacent arcs cut off by two of its sides be bisected, the line joining the points of bisection shall be trisected by the sides.
Σελίδα 355 - The sine of an angle is equal to the sine of its supplement. The sine rule Consider fig.