 | 1923 - 264 páginas
...are together equal to two right angles, then the two straight lines are parallel ; and the converse. Straight lines which are parallel to the same straight line are parallel to one another. Triangles and Rectilinear Figures. — The sum of the angles of a triangle is equal to two right angles.... | |
 | Arthur Warry Siddons, Reginald Thomas Hughes - 1926 - 202 páginas
...angles on the same side of the cutting line are together equal to two right angles . . . .10 JTHEOREM 6. Straight lines which are parallel to the same straight line are parallel to one another 11 JTHEOREM 7. If straight lines are drawn from a point parallel to the arms of an angle, the angle... | |
 | Euclid - 1933 - 328 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
 | University of Bombay - 1906 - 956 páginas
...are together equal to two right angles, then the two straight lines are parallel ; and the converse. Straight lines which are parallel to the same straight line are parallel to one another. Triangles and Rectilinear Figures. The sum of the angles of a triangle is equal to two right angles.... | |
 | Alexander Symon - 1935 - 722 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
 | 1967 - 624 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
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Straight lines which are parallel to the same straight line are parallel to one another. Triangles and Rectilinear Figures. The sum of the angles of a triangle is equal to two right angles. 
