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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.
Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ... - Σελίδα 9
των Robert Potts - 1868 - 410 σελίδες
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## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1806 - 518 σελίδες
...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. Let ABC be an isosceles triangle, of which the side AB is C Book I. equal to AC, and let the straight lines AB, AC be produced to *— v-' D and E ; the angle...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1806 - 311 σελίδες
...another ; and, if the equal sides be., produced, the angles upon the other side of the base shall also be equal. Let ABC be an isosceles triangle, of which the side AB is equal to AC, and let the straight lines AB, AC be produced to D and E ; the angle ABC shall hft- equal to the angle ACB, and...

## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1814
...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. Let ABC be an isosceles triangle, of which the Mile AB is Boo* I. equal to AC, and let the straight lines AB, AC be produced s- ~v~' to D and E, the...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1819 - 333 σελίδες
...another ; and if the equal sides be produced, the angles upon the other side of the base shall also be equal. Let ABC be an isosceles triangle, of which the side AB is equal to AC, and let the straight lines AB, AC be produced to D and E, the angle ABC shall be equal to the angle ACB, and the...

## Elements of Geometry: Containing the First Six Books of Euclid: With a ...

John Playfair - 1819 - 317 σελίδες
...another ; and if the equal sides be produced, the angles upon the other side of th? base shall also be, equal. Let ABC be an isosceles triangle, of which the side AB is equal t» AC, and let the straight lines AB, AC be produced to D and E, the angle ABC shall be equal to the...

## A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - 1825 - 372 σελίδες
...triangle are equal to one another ; and if the equal sides be produced, the angles upon the other iide of the base shall be equal. Let ABC be an Isosceles...triangle, of which the side AB is equal to AC, and let the straight lines AB, AC be produced to D and E, the angle ABC shall be equal to the angle ACB, and the...

## The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - 1827 - 513 σελίδες
...triangle are equal to one another ; and if f f1e equal sides be produced, the angles upon the otber side of the base shall be equal. Let ABC be an isosceles...triangle, of which the side AB is equal to AC, and let the straight lines AB, AC be produced to D and E: the angle ABC shall be equal to the angle ACB, and the...

## The Elements of Euclid: Viz, the First Six Books, Together with the Eleventh ...

Euclid, Robert Simson - 1829 - 516 σελίδες
...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. Let ABC...triangle, of which the side AB is equal to AC, and let the straight lines AB, AC be produced to D, and E, the angle ABC shall he equal to the angle ACB, and the...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1833 - 333 σελίδες
...Isosceles triangle are equal to one anotJier ; and if the equal sides be produced, the angles upon the other side of the base shall be equal. Let ABC...triangle, of which the side AB is equal to AC, and let the straight lines AB, AC be produced to D and E, the angle ABC shall be equal to the angle ACB, and the...

## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1835 - 513 σελίδες
...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. Let ABC...triangle, of which the side AB is equal to AC, and let the straight line AB, AC be produced Book I. to D and E ; the angle ABC shall be equal to the angle ACB,...