| Timothy Walker - 1829 - 156 σελίδες
...triangle will then be inscribed. Thus every triangle can be inscribed in a circle. 46. THEOREM. — The sum of the three angles of a triangle is always equal to two right angles. DEM. — The F 30 triangle ABC (fig. 30) being inscribed, each of its angles is measured by half the... | |
| Claudius Saunier - 1881 - 590 σελίδες
...circumstances the three angles are also equal ; and isosceles when only two sides are of equal length. The sum of the three angles of a triangle is always equal to two right angles. If only two of the angles are known, it is thus easy to determine the third. Similar triangles are... | |
| Raymond Macdonald Alden - 1900 - 308 σελίδες
...theorem. But it is clear that an intelligent debate cannot be held on the question, "Resolved, That the sum of the three angles of a triangle is always equal to two right angles." Neither can one debate successfully the statement that temperance is a useful virtue, or that the cruelties... | |
| Israel Euclid Rabinovitch - 1903 - 140 σελίδες
...zero at each point ; or, otherwise, the metric relations of space are completely determined, if the sum of the three angles of a triangle is always equal to two right angles. 2°. Besides the independence of line-length from position, we may assume with Euclid the existence... | |
| Arthur Wesley Chase - 1904 - 200 σελίδες
...included angle are given. Construction: — Assume two lines, the shorter to be not less than 1% in. long, placing them towards the upper left corner of the...any length, but for this drawing let it be between 234 in. and 3 in. long. 84 85 line. From either extremity (use the right), lay off a distance equal... | |
| George Wentworth, David Eugene Smith - 1910 - 232 σελίδες
...there in the angle made by the two hands of a clock ? How many at 4 o'clock ? at 2 o'clock ? 10. The sum of the three angles of a triangle is always equal to two right angles. In an equilateral triangle the angles are all equal. How many degrees in each ? 11. If there are 200... | |
| 1913 - 416 σελίδες
...It is plain that an intelligent debate cannot be held on the proposition, "Resolved, that the sum of three angles of a triangle is always equal to two right angles." Then further on he says that questions just as obvious as these are sometimes debated because their... | |
| Victor Alvin Ketcham - 1914 - 400 σελίδες
...geometry. It is plain that an intelligent debate cannot be held on the proposition, "Resolved, that the sum of the three angles of a triangle is always equal to two right angles." Equally useless from the standpoint of argumentation is it to dispute that "All men are mortal," that... | |
| William Phillips Sandford, Willard Hayes Yeager - 1927 - 248 σελίδες
...approximately $11,000,000,000. The map of Europe was considerably changed after the world war. The sum of the three angles of a triangle is always equal to two right angles. These are but a few examples. You will, no doubt, be able to think of many others. Each of these statements... | |
| Stanley Rabinowitz - 1992 - 554 σελίδες
...isosceles. Solid geometry: tetrahelix Problems sorted by topic Squares JRM 912. by Antonio Filz The sum of the three angles of a triangle is always equal to ir. But is the sum of the solid angles at the four vertices of a tetrahedron a constant? If so, what... | |
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