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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.
Elements of Geometry: Containing the First Six Books of Euclid with a ... - Side 14
af John Playfair - 1856 - 318 sider
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## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1806 - 546 sider
...are opposite shall be equal, each to each. Which was to be demonstrated. PROP. V. T1IEOR. THE angles at the base of an isosceles triangle are equal to...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...
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## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1806 - 320 sider
...Which was to be demonstrated. PROP. V. THEOR. THE angles at the base of an isosceles triangle are N. equal to one 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...
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## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1810 - 554 sider
...Which was to ^ be demonstrated. PROP. V. THEOR. THE angles at the base of an isosceles triangle arc equal to one another; and, if the equal sides be produced,...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^"*"w D and E, the angle...
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## Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory ..., Bind 5

John Mason Good - 1813 - 714 sider
...each, viz. those to which the equal sides are opposite. Prop. V. Theor. The angles at the base of ло isosceles triangle are equal to one another; and,...angles upon the other side of the base shall be equal. •Prop. VI. Tbeor. If two angles uf -a ti ian-1«** •fiu:i! to one another, the sides also which...
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## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1814 - 560 sider
...each. Which was to be demonstrated. PROP. V. THEOR. THE angles at the base of an isosceles'triangle are equal to one another; and if the equal sides 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...
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## A Treatise on Surveying, Containing the Theory and Practice: To which is ...

John Gummere - 1814 - 398 sider
...the acute angles be subtracted from 90% the remainder will be the other acute angle. r 8. The angles at the base of an isosceles triangle are equal to one another. 9. If one side of a triangle be produced, the external angle will be equal to the sum of the two internal...
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## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclides - 1816 - 588 sider
...demonstrated. PROP. V. THEOR. THE angles at the base of an isosceles triangle are equal to one andther; and if the equal sides be produced, the angles upon the other side of the base••shall be equal. , JL ABC be an isoscefes triangle, of which the side AB is B*o* I. equal...
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## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid, Robert Simson - 1821 - 514 sider
...THEOR. THE angles at the base of an isoceles triangle are equal to one another: and, if the equal-sides be produced, the angles upon the other side of the...be an isosceles triangle, of which the side AB is I i equal to AC, and let the straight lines AB, AC be produced to D and E, the angle ABC shall be equal...
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## The First Six Books with Notes

Euclid - 1822 - 222 sider
...equal (4). PROP- V. THEOR. In an isosceles triangle (BAC) the angles at the base Fig. 18. (due andACB) are equal to one another; and if the equal sides be produced, the angles below the base ( FBC and GCB) shall also be equal. Take any point F in the side produced, cut off AG...
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## Universal Technological Dictionary: Or, Familiar Explanations of the ..., Bind 2

George Crabb - 1823 - 704 sider
...or legs equal. According to the fifth proposition of the first book of Euclid's elements, the angles at the base of an isosceles triangle are equal to one another. ISOSTE'MONES (Bot.) a name given by Haller to one of his classes of plants. [SO'TONl (Med.) an epithet...
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