 | Robert Potts - 1865 - 528 pages
...equal to the angle BFE; (i. 8.) but when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of them is a right angle ; (i. def. 10.) therefore each of the angles AFE, BFE, is a right angle : wherefore the straight line... | |
 | Euclides - 1865 - 402 pages
...equal to the angle BFE ; (I. 8) but 'when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of them is a right angle ; (i. def. 10) therefore each of the angles AFE, BFE, is a right angle; wherefore the straight line... | |
 | Robert Potts - 1868 - 434 pages
...equal to the angle BFE; (I. 8.) but when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of them is a right angle; (I. def. 10.) therefore each of the angles AFE, BFE, is a right angle : wherefore the straight line... | |
 | Henry Major - Student teachers - 1873 - 588 pages
...to CHG ; and they are adjacent angles ; but when a straight line standing on a straight line makes the adjacent angles equal to one another, each of them is a right angle ; and the straight line which stands upon the other is called a perpendicular to it ; therefore from the given... | |
 | William Alexander Myers - Circle-squaring - 1873 - 238 pages
...the vertex, and the Hues //and /the legs of the angle. 16. When two straight lines cut each other so as to make the adjacent angles equal to one another, each of the angles is a right angle ; and the straight lines which so cut each other are perpendicular to one... | |
 | Euclides - 1874 - 342 pages
...equal to the angle BFE (I. 8) ; but when a straight line standing upon another straight line, makes the adjacent angles equal to one another, each of them is a right angle (I. Def. 10) ; therefore 2. Each of the angles AFE, BFE is a right angle ; wherefore the straight line... | |
 | William Alexander Myers - Circle-squaring - 1874 - 207 pages
...vertex, and the lines H and / the legs of the angle. 16. When two straight lines cut each other so as to make the adjacent angles equal to one another, each of the angles is a right angle ; and the straight lines which so cut each other are perpendicular to one... | |
 | Robert Potts - Geometry - 1876 - 446 pages
...equal to the angle BFE; (i. 8.) but when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of them is a right angle ; (I. def. 10.) therefore each of the angles AFE, BFE, is a right angle : •wherefore the straight... | |
 | Euclides - 1884 - 94 pages
...; and these are adjacent angles. But when a straight line standing on another straight line, makes the adjacent angles equal to one another, each of them is a right angle, and the straight line which stands upon the other is called a perpendicular to it. Therefore from the given... | |
 | Stewart W. and co - 1884 - 272 pages
...to CHG ; and they are adjacent angles ; but when a straight line standing on a straight line makes the adjacent angles equal to one another, each of them is a right angle ; and the straight line which stands upon the other is called a perpendicular to it ; therefore from the given... | |
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... common to the two triangles AFE, BFE, there are two sides in the one equal to two sides in the other, each to each ; and the base EA is equal to the base EB ; (i. 
