## 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 páginas |

### Dentro del libro

Resultados 1-5 de 74

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**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 femicircle . XIX . Right - lined figures are fuch as are contained under right - lines ... Página 4

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**diameter**AE , and two lines BK , CF , parallel to the fides , cutting the**diameter**in one and the fame point D , are drawn , so that the Parallelogram be divided by them into four Parallelograms ; thofe two LD , DG , through which the ... Página 20

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**diameter**BC bijects the fame . Because AB , CD , ( a ) are parallel , ( b ) therefore is the angle ABC BCD . Alfo because AC , BD , are ( a ) pa- rallel , ( b ) therefore is the angle ACB = CBD ; ( c ) there- fore the whole angle ACD ... Página 23

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**diameter**, are equal one to the other . For the triangle AEL ( a ) = AEG , and the triangle ADC ( a ) = ADB ; and the triangle DEK ( a ) -DEF ( 6 ) Therefore the Pgr . LDDG . Which was to be demon- ftrated . PRO P. XLIV . Fig . 42 . To ... Página 26

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**diameters**EB , HD . Then it is evident that AF is ( a ) equal to the triangle EAB twice taken , and ( b ) equal to the triangle HCD twice taken , and equal to ( a ) CG . Which was to be demonstrated . 2. Hyp . If it may be , let CD be ...### Otras ediciones - Ver todas

### Términos y frases comunes

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### Pasajes populares

Página 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.

Página 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...

Página 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.

Página 95 - An EVEN NUMBER is that which can be divided into two equal whole numbers.

Página 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.

Página 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.

Página 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.

Página 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.

Página 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.

Página 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.