## Geometry Without Axioms; Or the First Book of Euclid's Elements. With Alterations and Familiar Notes; and an Intercalary Book in which the Straight Line and Plane are Derived from Properties of the Sphere ...: To which is Added an Appendix ... |

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Side 2

A remark or observation connected with something that has gone before, is

called a

the meaning is, that its being so and so, makes part of the original supposition or

...

A remark or observation connected with something that has gone before, is

called a

**Scholium**. XXII. When a thing is said to be so and so by the hypothesis,the meaning is, that its being so and so, makes part of the original supposition or

...

Side 5

is to be admitted to be true, till it has been demonstrated as a distinct proposition.

For till this be done, it is impossible to know whether it is true or not.

**Scholium**. Neither the converse, the negative, nor the contrary of any proposition,is to be admitted to be true, till it has been demonstrated as a distinct proposition.

For till this be done, it is impossible to know whether it is true or not.

Side 28

8 above) no other point in the straight line will be in the surface of either of the

spheres.

See Notc. always of straight lines; nor of central distances, but always of radii.

8 above) no other point in the straight line will be in the surface of either of the

spheres.

**ScholIUM**.–Henceforward, mention will never be made of distances, butSee Notc. always of straight lines; nor of central distances, but always of radii.

Side 53

one another is only a point. There might, therefore, for all that has yet been

proved, be more equilateral triangles than one, describable on the same side of

AB.

**ScholIUM**.–It has not yet been proved that the place where the two circles crossone another is only a point. There might, therefore, for all that has yet been

proved, be more equilateral triangles than one, describable on the same side of

AB.

Side 55

Which if it were possible (though it will hereafter be shown that it is not), would in

no way affect the accuracy of the assertion that it has been shown how from A to

cut off a straight line equal to BC.—Referred back to, in the

Which if it were possible (though it will hereafter be shown that it is not), would in

no way affect the accuracy of the assertion that it has been shown how from A to

cut off a straight line equal to BC.—Referred back to, in the

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Geometry Without Axioms Or the First Book Euclid's Elements: With ... Uten tilgangsbegrensning - 1833 |

Geometry Without Axioms; Or the First Book of Euclid's Elements. with ... Thomas Perronet Thompson Ingen forhåndsvisning tilgjengelig - 2015 |

### Vanlige uttrykk og setninger

ABCD adjacent angles alternate angles angle ABC angle ACB angle BAC angular points aret equal assigned point axis base BC bisected called CEGDHF central distances change of place circle coincide throughout Constr demonstrated double equal straight lines equal to AC equal to EF equilateral triangle Euclid exterior angle extremities four right angles Geometry given straight line greater hard body inclose a space instance INTERC Intercalary Book ist equal join line AC magnitude manner meet opposite angles parallelogram parity of reasoning pass perpendicular prolonged Prop PROPOSITION proved quadrilateral radii radius rectilinear figure remain unmoved remaining angle remains at rest respectively Scholium self-rejoining line shown side BC side opposite situation sphere whose centre straight line BC tessera THEOREM.–If third side triangle ABC tryo turned unlimited length Wherefore willf

### Populære avsnitt

Side 51 - 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 109 - PARALLELOGRAMS upon the same base, and between the same parallels, are equal to one another...

Side 111 - Parallelograms upon the same base and between the same parallels, are equal to one another.

Side 120 - If the square described on one of the sides of a triangle be equal to the squares described on the other two sides of it, the angle contained by these two sides is a right angle.

Side 72 - Any two sides of a triangle are together greater than the third side.

Side 55 - From the greater of two given straight lines to cut off a part equal to the less. Let AB and C be the two given straight lines, whereof AB is the greater.

Side 70 - Any two angles of a triangle are together less than two right angles.

Side 138 - ... the exterior angle equal to the interior and opposite on the same side of the line ; and likewise the two interior angles on the same side of the line together equal to two right angles.

Side 106 - THE straight lines which join the extremities of two equal and parallel straight lines, towards the same parts, are also themselves equal and parallel.