## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago Vitiated These Books, are Corrected, and Some of Euclid's Demonstrations are Restored. Also, The Book of Euclid's Data, in Like Manner Corrected. viz. the first six books, together with the eleventh and twelfthMathew Carey, and sold by J. Conrad & Company, S. F. Bradford, Birch & Small, and Samuel Etheridge. Printed by T. & G. Palmer, 116, High-Street., 1806 - Trigonometry - 518 pages |

### From inside the book

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Page 113

1 . to the third angle : therefore the straight line KC is equal to CL , and the angle

FKC to the angle FLC : and because KC is equal to CL , KL is double of KC : in

the same manner , it may be

1 . to the third angle : therefore the straight line KC is equal to CL , and the angle

FKC to the angle FLC : and because KC is equal to CL , KL is double of KC : in

the same manner , it may be

**shown**that HK is double of BK : and because BK is ... Page 142

In like manner it may be

greater than KH : therefore , as has been

because the whole GH is the same multiple of the whole AB , that HK is of BE ,

the re ...

In like manner it may be

**shown**, that LM is greater than NP ... Next , Let KO begreater than KH : therefore , as has been

**shown**, NP is greater than NM : andbecause the whole GH is the same multiple of the whole AB , that HK is of BE ,

the re ...

Page 143

In like manner it D may be

; and if less , less . And in the case in which G A с L KO is not greater than KH , it

has been

In like manner it D may be

**shown**, that if GH be equal E to KO , LM is equal to NP; and if less , less . And in the case in which G A с L KO is not greater than KH , it

has been

**shown**that GH is always greater than KO , and likewise LM than NP ... Page 290

B. XII . square of BZ ; therefore the square of VA is less than the square of ZA ,

and the straight line AZ greater than VA : much more then is AZ greater than AG ;

because , in the preceding proposition , it was

circle ...

B. XII . square of BZ ; therefore the square of VA is less than the square of ZA ,

and the straight line AZ greater than VA : much more then is AZ greater than AG ;

because , in the preceding proposition , it was

**shown**that KV falls without thecircle ...

Page 463

This is made more explicit than in the Greek text , to prevent a mistake which the

author of the second demonstration of the 24th proposition in the Greek edition

has fallen into , of think .. ing that a ratio is given to which another ratio is

to ...

This is made more explicit than in the Greek text , to prevent a mistake which the

author of the second demonstration of the 24th proposition in the Greek edition

has fallen into , of think .. ing that a ratio is given to which another ratio is

**shown**to ...

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The Elements of Euclid, Viz: The Errors, by Which Theon, Or Others, Have ... Robert Simson,Robert Euclid No preview available - 2018 |

The Elements of Euclid, Viz: The Errors, by Which Theon, Or Others, Have ... Robert Simson,Robert Euclid No preview available - 2015 |

The Elements of Euclid: Viz. The First Six Books, Together With the Eleventh ... Robert Simson No preview available - 2017 |

### Common terms and phrases

ABCD added altitude angle ABC angle BAC base Book centre circle circle ABC circumference common cone cylinder definition demonstrated described diameter divided double draw drawn equal equal angles equiangular equimultiples excess fore four fourth given angle given in position given in species given magnitude given ratio given straight line greater Greek half join less likewise magnitude manner meet multiple opposite parallel parallelogram pass perpendicular plane prisms produced PROP proportionals proposition pyramid Q. E. D. PROP radius reason rectangle rectangle contained remaining right angles segment shown sides similar sine solid solid angle sphere square square of AC taken THEOR third triangle ABC wherefore whole

### Popular passages

Page 30 - Any two sides of a triangle are together greater than the third side.

Page 64 - To divide a given straight line into two parts, so that the rectangle contained by the whole, and one of the parts, may be equal to the square of the other part.

Page 30 - IF, from the ends of the 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. Let...

Page 59 - PROP. VIII. THEOR. IF a straight line be divided into any two parts, tour 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 28 - If one side of a triangle be produced, the exterior angle is greater than either of the interior opposite angles.

Page 165 - 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.

Page 19 - THE angles at the base of an isosceles triangle are equal to one another : and, if the equal sides be produced, the angles upon the other side of the base shall be equal.

Page 191 - In right angled triangles, the rectilineal figure described upon the side opposite to the right angle, is equal to the similar, and similarly described figures upon the sides containing the right angle.

Page 39 - 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 sidef. For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by drawing straight lines from a point F within the figure to each of its angles.

Page 180 - Therefore, universally, similar rectilineal figures are to one another in the duplicate ratio of their homologous sides.