## 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

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**equal**one to the other , then both those**equal**angles are right - angles ; and the right - line CG , which ftandeth on the other , is termed a Perpendicular to that ( AB ) where- on it ftandeth . Note , When Several angles meet at the ... Página 3

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**equal**; as the triangle ABC . Plate I. Fig . 4 . XXV . A Scalenum , is a triangle whose three fides are all unequal ...**equal**- angled figure is that whereof all the angles are**equal**. Two figures are equiangular , if the feveral ... Página 4

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**equal**to the fame thing , are alfo**equal**one to the other . As A B C. Therefore AC ; or therefore all A , B , C , are**equal**the one to the other . Note , When feveral quantities are joyned the one to the other continually with this mark ... Página 5

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**equal**things , the wholes will be unequal . 5. If from unequal things you take away**equal**things , the remainders will be unequal . 6. Things which are double to the fame third , or to**equal**things , are**equal**one to the other ... Página 7

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**equal**to two fides of the other ED , DF , each to its correfpondent fide ( that is BA - ED , and AC = DF ) and have the angel A**equal**to the angle D contained under the**equal**right - lines ; they shall have the bafe BC**equal**to the bafe ...### 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.