| William P. Berlinghoff, Kerry E. Grant, Dale Skrien - Mathematics - 2001 - 602 pages
...according to Euclid's description in the proof. Proposition 5: The angles opposite the equal sides **of an isosceles triangle are equal to one another; and, if the equal sides** are extended further, the angles made with the third side will be equal. Proof: Let ABC be an isosceles... | |
| R. H. Warn, John G. Horner - Technology & Engineering - 2002 - 284 pages
...drawn from the centre to the circumference of a circle are equal. (Euc. I. def. 30.) (6) The angles **at the base of an isosceles triangle are equal to one another.** (Euc. I. 5.) (c) The greater side of every triangle has the greater angle opposite to it. (Enc. I.... | |
| W. H. Hadow - Music - 2004 - 332 pages
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