## The Elements of Euclid for the Use of Schools and Colleges: Comprising the First Six Books and Portions of the Eleventh and Twelfth Books : with Notes, an Appendix, and Exercises |

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Side 4

An isosceles triangle is that which has two

that which has three unequal

has a right angle : [ The

...

An isosceles triangle is that which has two

**sides**equal : 26 . A scalene triangle isthat which has three unequal

**sides**: 27 . A right - angled triangle is that whichhas a right angle : [ The

**side**opposite to the right angle in a right - angled triangle...

Side 5

A rhomboid is that which has its opposite

besides these are called trapeziums . 35 . Parallel straight lines are such as are

in ...

A rhomboid is that which has its opposite

**sides**equal to one another , but all its**sides**are not equal , nor its angles right angles : 34 . All other four - sided figuresbesides these are called trapeziums . 35 . Parallel straight lines are such as are

in ...

Side 9

THEOREM . If two triangles have two

other , each to each , and have also the angles contained by those

one another , they shall also have their bases or third

THEOREM . If two triangles have two

**sides**of the one equal to two**sides**of theother , each to each , and have also the angles contained by those

**sides**equal toone another , they shall also have their bases or third

**sides**equal ... Side 10

The angles at the base of an isosceles triangle are equal to one another ; and if

the equal

equal to one another . Let ABC be an isosceles triangle , having the

equal ...

The angles at the base of an isosceles triangle are equal to one another ; and if

the equal

**sides**be produced the angles on the other**side**of the base shall beequal to one another . Let ABC be an isosceles triangle , having the

**side**ABequal ...

Side 11

Because AF is equal to AG , [ Constr . and AB to AC , [ Hypothesis . the two

FA , AC are equal to the two

angle FAG common to the two triangles AFC , AGB ; therefore the base FC is ...

Because AF is equal to AG , [ Constr . and AB to AC , [ Hypothesis . the two

**sides**FA , AC are equal to the two

**sides**GA , AB , each to each ; and they contain theangle FAG common to the two triangles AFC , AGB ; therefore the base FC is ...

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The Elements of Euclid for the Use of Schools and Colleges Isaac Todhunter Uten tilgangsbegrensning - 1872 |

The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ... Isaac Todhunter Uten tilgangsbegrensning - 1880 |

The Elements of Euclid for the Use of Schools and Colleges: Comprising the ... Euclid,Isaac Todhunter Uten tilgangsbegrensning - 1867 |

### Vanlige uttrykk og setninger

ABCD AC is equal angle ABC angle BAC Axiom base bisected Book centre chord circle ABC circumference common Construction Corollary Definition demonstration describe a circle described diameter difference divided double draw drawn equal equal angles equiangular equilateral equimultiples Euclid extremities fall figure fixed formed four fourth given circle given point given straight line greater half Hypothesis inscribed intersect join less Let ABC magnitudes manner meet middle point multiple namely opposite sides parallel parallelogram pass perpendicular plane polygon PROBLEM produced proportionals Q.E.D. PROPOSITION quadrilateral radius ratio reason rectangle contained rectilineal figure remaining respectively right angles segment shew shewn sides similar square straight line drawn suppose taken tangent THEOREM third triangle ABC twice Wherefore whole

### Populære avsnitt

Side 264 - 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.

Side 73 - 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 264 - To draw a straight line at right angles to a given straight line, from a given point in the same. Let AB be...

Side 184 - 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 10 - 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.

Side 300 - Describe a circle which shall pass through a given point and touch a given straight line and a given circle.

Side 60 - If a straight line be divided into any two parts, four 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.

Side 62 - If a straight line be divided into two equal, and also into two unequal parts, the squares on the two unequal parts are together double of the square on half the line, and of the square on the line between the points of section. Let the straight line AB be divided into two equal parts in the point C, and into two unequal parts in the point D ; The squares on AD and DB shall be together double of AD»+DB

Side 244 - Let AB and C be two unequal magnitudes, of which AB is the greater. If from AB there be taken more than its half, and from the remainder more than its half, and so on ; there shall at length remain a magnitude less than C. For C may be multiplied, so at length to become greater than AB.

Side 6 - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.