Euclide's Elements: The Whole Fifteen Books Compendiously Demonstrated: with Archimede's Theorems of the Sphere and Cylinder, Investigated by the Method of Indivisibles. Also, Euclide's Data, and A Brief Treatise [added by Flussas] of Regular SolidsW. and J. Mount, 1751 - 384 Seiten |
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Seite 96
... plane number ; and the numbers which multipled one another , are called the fides of it : So 2 ( C ) × 3 ( D ) = 6 CD is a plane number . XVII . But when three numbers multiplying one another produce any number , the number produced is ...
... plane number ; and the numbers which multipled one another , are called the fides of it : So 2 ( C ) × 3 ( D ) = 6 CD is a plane number . XVII . But when three numbers multiplying one another produce any number , the number produced is ...
Seite 97
... plane , and folid numbers , are those which have their fides proportional : Namely , not all the fides , but fome . XXII . A perfect Number is that which is equal to its own parts . As 6 , and 28. But a number that is less than it's ...
... plane , and folid numbers , are those which have their fides proportional : Namely , not all the fides , but fome . XXII . A perfect Number is that which is equal to its own parts . As 6 , and 28. But a number that is less than it's ...
Seite 98
... plane , folid , Square , or cube number . 8. If one number measures another , that number by which it measureth shall measure the fame by the units that are in the number measuring , that is , by the num- ber it felf that measures ...
... plane , folid , Square , or cube number . 8. If one number measures another , that number by which it measureth shall measure the fame by the units that are in the number measuring , that is , by the num- ber it felf that measures ...
Seite 122
... plane num- bers CD and EF there is one mean proportional number DE : And the plane C D is to the plane EF in duplicate proportion of that which the fide Chath to the homologous fide E. For by the Hypothefis C : DE : F ; therefore by ...
... plane num- bers CD and EF there is one mean proportional number DE : And the plane C D is to the plane EF in duplicate proportion of that which the fide Chath to the homologous fide E. For by the Hypothefis C : DE : F ; therefore by ...
Seite 123
... plane numbers . But becaufe EF ( c ) = C ( c ) = DG ; ( e ) therefore D : E : F : G , and alternately D : F :: E : G. ( f ) Therefore the plane numbers A and B are al- fo like . Which was to be dem . PROP . If between two numbers A , B ...
... plane numbers . But becaufe EF ( c ) = C ( c ) = DG ; ( e ) therefore D : E : F : G , and alternately D : F :: E : G. ( f ) Therefore the plane numbers A and B are al- fo like . Which was to be dem . PROP . If between two numbers A , B ...
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Seite 18 - 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.
Seite 281 - ... which, when produced, the perpendicular falls, and the straight line intercepted, without the triangle, between the perpendicular and the obtuse angle. Let ABC be an obtuse-angled triangle, having the obtuse angle ACB, and from the point A let AD be drawn...
Seite 2 - XV. A Circle is a plain figure contained under one line, which is called a circumference ; unto which all lines, drawn from one point within the figure, and falling upon the circumference thereof, are equal the one to the other. XVI. And that point is called the center of the circle. XVII. A Diameter of a circle is a right-line drawn thro' the center thereof, and ending at the circumference on either fide, dividing the circle into two equal parts.
Seite 95 - An EVEN NUMBER is that which can be divided into two equal whole numbers.
Seite 381 - Rule. Multiply the Logarithm of the given number by the Index of the proposed power, and the product will be the Logarithm, whose natural number is the power required.
Seite 197 - ... than the other side, an obtuse-angled ; and if greater, an acute-angled cone. XIX. The axis of a cone is the fixed straight line about which the triangle revolves. XX. The base of a cone is the circle described by that side containing the right angle, which revolves. XXI. A cylinder is a solid figure described by the revolution of a rightangled parallelogram about one of its sides which remains fixed.
Seite 196 - ... are •not in the fame Superficies: Or, a folid Angle is that which is contained under more than two plane Angles which are not in the fame Superficies, but being all at one Point. XII. A Pyramid is a folid Figure comprehended under divers Planes fet upon one Plane, and put together at one Point. ' «. XIII. A Prifm is a folid Figure contained under Planes, whereof the two oppofite are equal, fimilar, and parallel, and the others Parallelograms.
Seite 353 - To divide one number by another.* Subtract the logarithm of the divisor from the logarithm of the dividend, and the remainder will be the logarithm of the quotient.
Seite 2 - ... parts. XVIII. A Semicircle is a figure which is contained under the diameter and that part of the circumference which is cut off by the diameter. In the circle EABCD, E is the center, AC the diameter > ABC the femi circle.
Seite 51 - ... touch the circumference of the circle. IV A right-lined figure is faid to be defcribed about a circle, when all the fides of the figure which is circumfcribed touch the periphery of the circle V.