## Euclid's Elements of Geometry: From the Latin Translation of Commandine. To which is Added, a Treatise of the Nature and Arithmetic of Logarithms ; Likewise Another of the Elements of Plane and Spherical Trigonometry |

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### Common terms and phrases

A B is equal adjacent Angles alfo equal Angle ABC Angle BAC bisected Centre Circle A B C D Circumserence Cone Cylinder D E F described Diameter drawn thro equal Angles Equi equiangular equilateral Equimultiples Euclid f equal faid fame Altitude fame Multiple fame Plane fame Proportion fame Reafon fome fore given Right Line Gnomon greater homologous join less likewise Logarithm Magnitudes Neper Number parallel Parallelogram passing thro perpendicular Polygon Prism PROPOSITION Pyramid Quadrant Ratio Rectangle contained remaining Angle Right Angles Right Line A B Right-lined Figure Segment Semicircle similar Sine Sphere Square of A C Subtangent subtending Theorem thereof three Right Lines tiple Triangle ABC Unity Vertex the Point Whence Wherefore whole

### Popular passages

Page 195 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.

Page 165 - IF two triangles have one angle of the one equal to one angle of the other, and the sides about the equal angles proportionals : the triangles shall be equiangular, and shall have those angles equal which are opposite to the homologous sides.

Page 169 - Equal parallelograms which have one angle of the one equal to one angle of the other, have their sides about the equal angles...

Page 22 - ... sides equal to them of the other. Let ABC, DEF be two triangles which have the two sides AB, AC equal to the two sides DE, DF, each to each, viz. AB...

Page 54 - If 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 part, is equal to the square of the straight line which is made up of the whole and that part.

Page 123 - GB is equal to E, and HD to F; GB and HD together are equal to E and F together : wherefore as many magnitudes as...

Page 215 - CD; therefore AC is a parallelogram. In like manner, it may be proved that each of the figures CE, FG, GB, BF, AE, is a parallelogram...

Page 196 - ABC, and they are both in the same plane, which is impossible ; therefore the straight line BC is not above the plane in which are BD and BE: wherefore, the three straight lines BC, BD, BE are in one and the same plane. Therefore, if three straight lines, &c.

Page 161 - And because HE is parallel to KC, one of the sides of the triangle DKC, as CE to ED, so is...

Page 207 - A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are perpendicular to the other plane. V. The inclination of a straight line to a plane...