 | Charles Reiner - 1837 - 254 pagina’s
...angles are equal to each other. 12. An obtuse angle is that which is greater than a right angle. 13. An acute angle is that which is less than a right angle. 14. All obtuse angles are not equal to each other; nor are all acute angles equal to each other. 15.... | |
 | Edward Tagart - 1837 - 156 pagina’s
...of two straight lines to one another, which meet together but are not in the same straight line." " An obtuse angle is that which is greater than a right angle." With what propriety can it be said that these are hypotheses? An hypothesis is that mode of accounting... | |
 | Euclid, James Thomson - 1837 - 410 pagina’s
...be at right angles to it. 9. An obtuse angle is that / which is greater than a right [_ / angle. 10. An acute angle is that which is less than a right angle. 11. Parallel straight lines are those which are in — • the same plane, and which, being produced... | |
 | Andrew Bell - 1837 - 290 pagina’s
...placed within the angle ; thus, angle DBG may be called angle n ; angle ABD, m ; and angle ABC, m n. 11. An obtuse angle is that which is greater than a right angle. 12. An acute angle is that •which is less than a right angle._ 13. A figure is that which is inclosed... | |
 | Charles Reiner - 1837 - 246 pagina’s
...each other, each of them is called a right angle. 11. All right angles are equal to each other. 12. An obtuse angle is that which is greater than a right angle. 13. An acute angle is that which is less than a right angle. 14. All obtuse angles are not equal to... | |
 | Euclides - 1838 - 264 pagina’s
...angles is called a right angle ; and the straight lines are said to be perpendicular to each other. IX. An obtuse angle is that which is greater than a right...acute angle is that which is less than a right angle. XI. A figure is that which is enclosed by one or more boundaries. XII. A circle is a plane figure contained... | |
 | John Clark (drawing master.) - 1840 - 208 pagina’s
...by the number of degrees which it contains, or its proportion of the circum-c ference of a circle. An Obtuse Angle is that which is greater than a right angle, thus, An Acute Angle is that which is less than a right angle, thus, The Equilateral Triangle is a... | |
 | Euclides - 1841 - 378 pagina’s
...right angle; and the straight line which stands on the other is called a perpendicular to it. XI. XII. An acute angle is that which is less ^\ than a right angle. X>. XIII. " A term or boundary is the extremity of anything." XIV. A figure is that which is enclosed... | |
 | John Playfair - 1842 - 332 pagina’s
...a right angle ; and the straight line which stands on the other, is called a perpendicular to it 8. An obtuse angle is that which is greater than a right angle. 9. An acute angle is that which is less than a right angle. 10. A figure is that which is enclosed... | |
 | Euclides - 1842 - 316 pagina’s
...right angle ; and the straight line which stands on the other is called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is less than a right angle. XIV. A figure is that which is inclosed... | |
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When a straight line standing on another straight line, makes the adjacent angles equal to one another, each of the angles is called a, right angle ; and the straight line which stands on the other is called a perpendicular to it. 11. An obtuse angle... 
