| 1888
...think, in the words, " He that walketh with wise men shall be wise." The boy that has learned to prove **that the angles at the base of an isosceles triangle are equal** to one another — especially if he has learned it after Euclid — has made a certain gain in mental... | |
| George Johnston Allman - 1889 - 237 páginas
...proposes a problem ; for it is possible to inscribe one that is not equilateral. But when anyone asserts **that the angles at the base of an isosceles triangle are equal,** he must affirm that he proposes a theorem ; for it is not possible that the angles at the base of an... | |
| Noah Porter - 1890 - 565 páginas
...plaiued by an In the fifth proposition of Playfair's Geometry, BI, it is proposed example. to prove **that the angles at the base of an isosceles triangle are equal.** The first step is to prepare the diagram by producing the two sides, AB, and AC, indefinitely towards... | |
| 1910
...school. The Euclid in itself is not of much practical use — no one wants to prove in everyday life **that the angles at the base of an isosceles triangle are equal** to one another or that the three angles of a triangle are equal to two right angles, but you learn... | |
| Charles Sanders Peirce - 1966 - 446 páginas
...should, of course, look for his demonstrations among the most awkward. We find it stated, for instance, **that the angles at the base of an isosceles triangle are equal** was first "set forth and said by" Thales. This is evidently a quotation from a poet and is supposed... | |
| Elijah Coleman Bridgman, Samuel Wells Willaims - 1842
...their vacant time, — proceeded, one to perform a problem, and the other to demonstrate the theorem, **that " the angles at the base of an isosceles triangle are equal."** They had gone, it was remarked, about halfway through the first book of Playfair's Euclid, demonstrating... | |
| 1878
...fifth proposition of Euclid for the sake of the] discipline, not for the sake of learning the mere fact **that the angles at the base of an isosceles triangle are equal.** She answered, ' Yes, that is quite true, and I often think that we are on the wrong track altogether... | |
| 1851
...shown that there is only one intel. ligible law, then that must be the actual law. Thus we may argue **that the angles at the base of an isosceles triangle are equal** ( not because there is no reason why one should be greater than the other, but), because, if not, no... | |
| John B. Bremner - 1980 - 405 páginas
...PONS ASINORUM Straight Latin for "bridge of asses," pons asinorum is the nickname for Euclid's theorem **that the angles at the base of an isosceles triangle are equal.** The theorem was considered hard for beginners to understand, and pons asinorum has come to mean any... | |
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