 | 1836 - 488 pàgines
...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...the line or lines which bound it. 11. A circle is a plain figure contained by one line, which is called the circumference, and is such that all straight... | |
 | John Playfair - 1837 - 332 pàgines
...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...boundaries. — The word area denotes the quantity of spaci contained in a figure, without any reference to the nature of the line or lines which bound it.... | |
 | Euclid, James Thomson - 1837 - 410 pàgines
...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... | |
 | Charles Reiner - 1837 - 254 pàgines
...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.... | |
 | Euclides - 1838 - 264 pàgines
...to be perpendicular to each other. IX. An obtuse angle is that which is greater than a right angle. An 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... | |
 | Euclides - 1840 - 192 pàgines
...being in the same plane, they are incapable of meeting in a single point, however they be produced. 11. A FIGURE is that which is enclosed by one or more boundaries. [The space enclosed within a figure is called its AREA.] 12. A CIRCLE is a plane figure bounded by one line... | |
 | John Clark (drawing master.) - 1840 - 208 pàgines
...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 figure which has three Flg- 4- equal sides. It is particularly... | |
 | Euclides - 1841 - 378 pàgines
...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 pàgines
...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...reference to the nature of the line or lines which bound it.m 1 1 . A circle is a plane figure contained by one line, which is called the circumference, and... | |
 | Euclides - 1842 - 316 pàgines
...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 by one or more boundaries. XV. A circle is a plane figure contained... | |
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... 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 is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term... 
