## The synoptical Euclid; being the first four books of Euclid's Elements of geometry, with exercises, by S.A. Good |

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PREFACE In this edition , it is endeavoured , by a new , yet extremely simple , typographical arrangement , to render the text of Euclid more perspicuous than when printed in the ordinary

PREFACE In this edition , it is endeavoured , by a new , yet extremely simple , typographical arrangement , to render the text of Euclid more perspicuous than when printed in the ordinary

**manner**, and to make it , as it were , its own ... Side 15

The angle CBE is equal to the angle EBA ; in the same

The angle CBE is equal to the angle EBA ; in the same

**manner**, because ABD is a straight line , 2 . The angle DBE is equal to the angle EB4 ; wherefore ( Ax . 1. ) 3 . The angle DBE is equal to the angle CBE , the less to the greater ... Side 18

And in like

And in like

**manner**it may be demonstrated that no other can be in the same straight line with it but BD , therefore 5 . BD is in the same straight line with CB . Wherefore , if at a point , & c . Q.E.D. PROP . XV . - THEOREM . Side 19

In the same

In the same

**manner**it can be demonstrated that 5 . The angles CEB , AED , are equal . Therefore , if two straight lines , & c . Q.E.D. CoR . 1. – From this it is manifest , that , if two straight lines cut one another , the angles they ... Side 20

In like

In like

**manner**, it may be demonstrated , that 5 . BAC , ACB , as also CAB , ABC , are less than two right angles . Therefore any two angles , & c . Q.E.D. ر PROP . XVIII . - THEOREM . The greater side of every triangle is opposite to ...### Hva folk mener - Skriv en omtale

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The Synoptical Euclid; Being the First Four Books of Euclid's Elements of ... Uten tilgangsbegrensning - 1854 |

### Vanlige uttrykk og setninger

ABCD AC is equal AF is equal angle ABC angle ACB angle BAC angle BCD angle equal base base BC bisected centre circle ABC circumference coincide common demonstrated describe diameter distance divided double draw equal angles exterior angle extremity fall figure four given circle given point given straight line given triangle gnomon greater impossible inscribed join less Let ABC likewise manner meet opposite angles parallel parallelogram pass pentagon perpendicular point F PROBLEM produced Q.E.D. PROP reason rectangle contained rectilineal figure remaining angle required to describe right angles segment semicircle shown sides square of AC straight line AC THEOREM touches the circle triangle ABC twice the rectangle wherefore whole

### Populære avsnitt

Side 26 - 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. either the sides adjacent to the equal...

Side 22 - If from the ends of a side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than the other two sides of the triangle, but shall contain a greater angle.

Side 32 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.

Side 1 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies. vm. "A plane angle is the inclination of two lines to one another in a plane, which meet together, but are not in the same direction.

Side 97 - 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.

Side 7 - AB; but things which are equal to the same are equal to one another...

Side 14 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line : it is required to divide it intotwo equal parts.

Side 53 - IF a straight line be divided into any two parts, the squares of the whole line, and of one of the parts, are equal to twice the rectangle contained by the whole and that part, together with the square of the other part.

Side 41 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.

Side 52 - If a straight line be bisected, and produced to any point; the rectangle contained by the whole line thus produced, and the part of it produced...