## A companion to Euclid: being a help to the understanding and remembering of the first four books. With a set of improved figures, and an original demonstration of the proposition called in Euclid the twelfth axiom, by a graduate |

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With Choice Receipts and Valuable Hints . Price 3s , 6d . , THE

FRIEND ; A MANUAL of PRACTICAL ADVICE and INSTRUCTION to

FEMALES , on their entering upon the DUTIES of LIFE after quitting School .

With Choice Receipts and Valuable Hints . Price 3s , 6d . , THE

**YOUNG**LADY ' SFRIEND ; A MANUAL of PRACTICAL ADVICE and INSTRUCTION to

**YOUNG**FEMALES , on their entering upon the DUTIES of LIFE after quitting School .

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Price 35 . , ABBOTT ' S READER ; A Series of Familiar Pieces , in Prose and

Verse , calculated to produce a Moral Influence on the Hearts and Lives of

Persons . By the Authors of the

The ...

Price 35 . , ABBOTT ' S READER ; A Series of Familiar Pieces , in Prose and

Verse , calculated to produce a Moral Influence on the Hearts and Lives of

**Young**Persons . By the Authors of the

**YOUNG**CHRISTIAN THE CORNER - STONE ;The ...

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... price Is . 6d . , FIVE HUNDRED CHARADES , From History , Geography , and

Biography . FABLES AND MORAL MAXIMS , in PROSE and VERSE Selected by

ANNE PARKER . Price 3s . 6d . , POPULAR POEMS FOR

... price Is . 6d . , FIVE HUNDRED CHARADES , From History , Geography , and

Biography . FABLES AND MORAL MAXIMS , in PROSE and VERSE Selected by

ANNE PARKER . Price 3s . 6d . , POPULAR POEMS FOR

**YOUNG**PERSONS . Side

6d . , THE HISTORY OF SANDFORD AND MERTON ; Written by THOMAS DAY ,

for the Use of

ZORNLIN . Price ls . each , with Engravings , PERSIAN FABLES , for

6d . , THE HISTORY OF SANDFORD AND MERTON ; Written by THOMAS DAY ,

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**Young**Persons . Modernized and Abridged by ROSINA MARIAZORNLIN . Price ls . each , with Engravings , PERSIAN FABLES , for

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entertaining ; Religious , Moral , and Social , Principles are combined with Useful

Information , and a Christian character and tendency is given to Popular

Knowledge .

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**Young**People in general . Its contents are at once instructive andentertaining ; Religious , Moral , and Social , Principles are combined with Useful

Information , and a Christian character and tendency is given to Popular

Knowledge .

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alternate angle contained angle equal applied Argument ad absurdum base bisect BOOK centre circumference coincides construction Demonstration described diameter directed divided draw drawn Edition Engravings equal equiangular equilateral Euclid extremities fall figure given circle given point given rectilineal given straight line greater HISTORY impossible inscribe interior joins learner least less meet Nature necessary opposite parallel parallelogram pass pentagon point of contact Problem produced proof PROPOSITION PROPOSITION VIII PROPOSITION XV Proved by showing READINGS rectangle contained right angles right line right Zs segment shows the supposition sides similarly square Steps straight line Suppose supposition is false Theorem touch triangle VOLUME whole whole line YOUNG

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Side 24 - 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, namely, either t}le sides adjacent to the equal...

Side 45 - To divide a given straight line into two parts, so that the rectangle contained by the whole and one of the parts, shall be equal to the square of the other part.

Side 18 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.

Side 61 - From this it is manifest that the straight line which is drawn at right angles to the diameter of a circle from the extremity of it, touches the circle...

Side 37 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.

Side 76 - 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 77 - If from a point without a circle there be drawn two straight lines, one of which cuts the circle, and the other meets it, and if the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, be equal to the square on GEOMETRY.

Side 72 - If a straight line touch a circle, and from the point of contact a straight line be drawn at right angles to the touching line, the centre of the circle shall be in that line.

Side 27 - If a straight line fall on two parallel straight lines, it makes the alternate angles equal to one another, and the exterior angle equal to the interior and opposite angle on the same side; and also the two interior angles on the same side together equal to two right angles.