## Euclid's Elements of Geometry: The First Six, the Eleventh and Twelfth Books |

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Side 10

Wherefore the point c will agree with the point F , because the right line Ac is equal to the right line DF ; but the point B will agree with the point E. And therefore the

Wherefore the point c will agree with the point F , because the right line Ac is equal to the right line DF ; but the point B will agree with the point E. And therefore the

**base**Bc agrees with the**base**EF ; for if the point B agrees ... Side 11

The angles at the

The angles at the

**base**of isosceles triangles are equal to one another ; ard the equal rigbt lines being produced , the angles under ihe**base**fall be equal to one another x . Let ABC be an isosceles triangle , having the side AB equal ... Side 12

will be equal to the remaining angle ACB ; and they are at the

will be equal to the remaining angle ACB ; and they are at the

**base**of the triangle ABC . But also it has been demonstrated , that the angle F B C is equal to the angle G CB , and they are under the**base**. Therefore the angles at the ... Side 14

If two triangles have two sides of the one equal to two fides of the other , each to each , and have also equal

If two triangles have two sides of the one equal to two fides of the other , each to each , and have also equal

**bases**, then shall the angle contained by the equal fides of the one triangle , be equal to the angle contained by the equal ... Side 15

Let the

Let the

**base**b c be Case i . conceived to be put upon the**base**A EF , so that the triangle a b c falls not upon the triangle EDF , but on the contrary way , as does the triangle A E F. Then the two sides DF , F A either both make one ...### Hva folk mener - Skriv en omtale

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Euclid's Elements of Geometry: The First Six, the Eleventh and Twelfth Books Euclid,David Gregory Ingen forhåndsvisning tilgjengelig - 2016 |

### Vanlige uttrykk og setninger

A B C ABCD added alſo altitude baſe becauſe centre circle circumference common cone cylinder definition demonſtrated deſcribed diameter difference divided double draw drawn equal equal angles equiangular equimultiples Euclid exceeds fall fame fides figure firſt folid fore fourth given right line greater half inſcribed join leſs magnitudes manner meet multiple oppoſite parallel parallelogram perpendicular plane polygon priſms PROP proportional propoſition proved pyramid ratio rectangle remaining angle right angles right line A B right lined figure ſame ſay ſecond ſegment ſhall ſides ſimilar ſince ſolid ſome ſphere ſquare ſtand ſum taken THEOR theſe third thoſe thro touch triangle triangle ABC twice vertex Wherefore whole whoſe baſe

### Populære avsnitt

Side 247 - 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.

Side 30 - 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 248 - But it was proved that the angle AGB is equal to the angle at F ; therefore the angle at F is greater than a right angle : But by the hypothesis, it is less than a right angle ; which is absurd.

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

Side 32 - Let the straight line EF, which falls upon the two straight lines AB, CD, make the alternate angles AEF, EFD equal to one another; AB is parallel to CD.

Side 56 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.

Side 391 - KL: but the cylinder CM is equal to the cylinder EB, and the axis LN to the axis GH; therefore as the cylinder EB to...

Side 110 - If any two points be taken in the circumference of a circle, the straight line which joins them shall fall within the circle.

Side 130 - When you have proved that the three angles of every triangle are equal to two right angles...

Side 183 - FK : in the same manner it may be demonstrated, that FL, FM, FG are each of them equal to FH, or FK : therefore the five straight lines FG, FH, FK, FL, FM are equal to one another : wherefore the circle described from the centre F, at the distance of...