| John Playfair - Trigonometry - 1806 - 311 pages
...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... | |
| John Mason Good - 1813
...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... | |
| John Gummere - Surveying - 1814 - 346 pages
...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... | |
| Euclides - 1816 - 528 pages
...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... | |
| John Playfair - Circle-squaring - 1819 - 333 pages
...are opposite, shall be equal, each to each. Which was to be demonstrated. PROP. V. THEOR. The angles **at the base of an Isosceles triangle are equal to...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... | |
| John Playfair - 1819 - 317 pages
...opposite, shall be equal, each to each. Which was to be demonstrated. • PROP. V. THEOR. The angles **at the base of an Isosceles triangle are equal to...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»... | |
| Euclid - 1822 - 179 pages
...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... | |
| George Crabb - Industrial arts - 1823
...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... | |
| Peter Nicholson - Mathematics - 1825 - 372 pages
...opposite shall be equal, each to each. Which was to be demonstrated. Proposition. V. Theorem. The angles **at the base of an Isosceles triangle are equal to...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... | |
| Euclid, John Playfair - Euclid's Elements - 1826 - 320 pages
...eaeh to eaeh. Whieh was to be demonstrated. i PROP. V. THiiOR, The angles at the base of an isoseeles **triangle are equal to one another ; and if the equal sides be** produeed, the angles upon the other side of the base shall also be equal. Let ABC he an isoseeles triangle,... | |
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