## Elements of Geometry: Containing the First Six Books of Euclid: With a Supplement on the Quadrature of the Circle and the Geometry of Solids ... |

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Side ix

In the Second Book of the Supplement , which treats of the intersection of Planes

, I have departed as little as possible from Euclid's method of considering the

same subject in his eleventh Book . The demonstration of the fourth

...

In the Second Book of the Supplement , which treats of the intersection of Planes

, I have departed as little as possible from Euclid's method of considering the

same subject in his eleventh Book . The demonstration of the fourth

**proposition**is...

Side xii

The comparison of this last solid with the cylinder , concludes the last Book of the

Supplement , and is a

terminating the elementary part of Geometry . 2 11 The Book of the Data has

been ...

The comparison of this last solid with the cylinder , concludes the last Book of the

Supplement , and is a

**proposition**that may not iinproperly be considered asterminating the elementary part of Geometry . 2 11 The Book of the Data has

been ...

Side xiv

... that they have been at great pains to prove the truth of many simple

to shew its necessary connection with other

them .

... that they have been at great pains to prove the truth of many simple

**propositions**, which every body is ready to admit ... of a certain**proposition**, butto shew its necessary connection with other

**propositions**, and its dependance onthem .

Side xv

... a truth , which , without proof , most inen will be inclined to admit ; but are we

for that reason to account it of no consequence to know what the

, which must cease to be true if this

... a truth , which , without proof , most inen will be inclined to admit ; but are we

for that reason to account it of no consequence to know what the

**propositions**are, which must cease to be true if this

**proposition**were supposed to be false ? Side xvi

is thus acquired ; it is much to be feared , that he who ' has declined the trouble of

tracing the connection between the

are more simple , will not be very expert in tracing its connection with those that ...

is thus acquired ; it is much to be feared , that he who ' has declined the trouble of

tracing the connection between the

**proposition**already quoted , and those thatare more simple , will not be very expert in tracing its connection with those that ...

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Elements of Geometry: Containing the First Six Books of Euclid, with a ... John Playfair Uten tilgangsbegrensning - 1836 |

Elements of Geometry: Containing the First Six Books of Euclid : with a ... John Playfair Uten tilgangsbegrensning - 1837 |

Elements of Geometry: Containing the First Six Books of Euclid: With a ... John Playfair Uten tilgangsbegrensning - 1854 |

### Vanlige uttrykk og setninger

ABCD altitude angle ABC angle BAC arch base bisected Book called centre circle circle ABC circumference coincide common cosine cylinder definition demonstrated described diameter difference divided double draw drawn equal equal angles equiangular Euclid exterior extremity fall fore four fourth given given straight line greater half inscribed interior join less Let ABC magnitudes manner meet multiple opposite parallel parallelogram pass perpendicular plane polygon prism produced PROP proportionals proposition proved Q. E. D. PROP radius ratio reason rectangle contained rectilineal figure right angles segment shewn sides similar sine solid square straight line taken tangent THEOR thing third touches triangle ABC wherefore whole

### Populære avsnitt

Side 153 - If from the vertical angle of a triangle a straight line be drawn perpendicular to the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the perpendicular and the diameter of the circle...

Side 19 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.

Side 33 - THE greater angle of every triangle is subtended by the greater side, or has the greater side opposite to it.

Side 292 - If a straight line meet two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...

Side 308 - 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 36 - IF two triangles have two sides of the one equal to two sides of the other, each to each, but the angle contained by the two sides of one of them greater than the angle contained by the two sides equal to them, of the other ; the base of that which has the greater angle shall be greater than the base of the other.

Side 18 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.

Side 78 - To draw a straight line from a given point, either without or in the circumference, which shall touch a given circle. First, let A be a given point without the given circle BCD : it is required to draw a straight line from A which shall touch the circle.

Side 77 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of it, falls without the circle...

Side 39 - If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another ; and the exterior angle equal to the interior and opposite upon the same side ; and likewise the too interior angles upon the same side together equal to two right angles.