 | Marcius Willson - 1873 - 236 páginas
...opening between two lines that meet. When one straight line (ab) falls upon another straight line (cd), so as to make the adjacent angles (x, x) equal, the...(e) is an angle that is less than a right angle ; an oUuse angle (ri) is an angle that is greater than a right angle. Aplane is a surface, on which, if... | |
 | Marcius Willson - 1881 - 258 páginas
...opening between two lines that meet. When one straight line (ab) falls upon another straight line (cd), so as to make the adjacent angles (x, x) equal, the...angles thus formed are right angles. The angle at a-, No. 2, is also a right angle. An acute angle (e) is an angle that is less than a right angle ;... | |
 | George Morris Philips, Robert Franklin Anderson - 1912 - 304 páginas
...NOTE. — Notice that if BC were extended, AC would form with EC two equal angles. 127. An acute angle is an angle that is less than a right angle. An obtuse angle is an angle that is greater than a right angle. Acute Angle Right Angle ANGLES 128. An angle equal... | |
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No. 2, is also a right angle. An acute angle (e) is an angle that is less than a right angle ; an obtuse angle (n) is an angle that is greater than a right angle. Aplane is a surface, on which, if any two points be taken, the straight line which joins... 