 | B. Marks - 1875 - 176 σελίδες
...ANGLES. Is the angle mpq greater or less than the right angle mpr ? Then it is called an acute angle. An acute angle is one which is less than a right angle. Read four acute angles whose vertices are atjo. Acute means sharp. Why is rps an acute angle ? What... | |
 | Euclides, James Hamblin Smith - 1876 - 376 σελίδες
...PERPENDICULAR to the other, a Ji D X. An OBTUSE ANGLE is one which is greater than a right angle. XI. An ACUTE ANGLE is one which is less than a right angle. XII. A FIGURE is that which is enclosed by one or more boundaries. XIII. A CIRCLE is a plane figure... | |
 | Henry Bartlett Maglathlin, Benjamin Greenleaf - 1876 - 374 σελίδες
...Straight Line ? A Curved Line ? A Plane? A Curved Surface? Parallel Lines? A Right Angle? An Acute Angle ? An Obtuse Angle is one which is greater than a right single. The sides of an angle are the lines forming it, and the vertex of an angle the point of their... | |
 | Elias Loomis - 1877 - 458 σελίδες
...A c 3 the angles ACD, BCD equal, each is a right angle, and the line CD is perpendicular to AB. 20. An acute angle is one which is less than a right ./ angle. s An obtuse angle is one which is greater than a right angle. 21. Intersecting lines which are not... | |
 | Edward Olney - 1879 - 404 σελίδες
...angle is a square B — corner. 208. An Acute Angle is an angle whieh is less than a right angle, and an Obtuse Angle is one which is greater than a right angle. For the method of measuring angles, see Circular Measure. 209. A space which has length and breadth,... | |
 | Elias Loomis - 1880 - 452 σελίδες
...-£ c B the angles ACD, BCD equal, each is a right angle, and the line CD is perpendicular to AB. 20. An acute angle is one which is less than a right angle....angle is one which is greater than a right angle. 21. Intersecting lines which are not perpendicular are said to be oblique to each other, and angles... | |
 | Euclides, Frederick Burn Harvey - 1880 - 178 σελίδες
...AB and CB are each perpendicular to BD. 11. AN OBTUSE ANGLE is one which is greater than a right 12. AN ACUTE ANGLE is one which is less than a right .angle. 13. A TERM OR BOUNDARY is the extremity of anything. 14. A FIGURE is that which is contained by one... | |
 | Simon Newcomb - 1881 - 418 σελίδες
...sum of the two right angles ABC and ABD is (18) the angle CBD, which is a straight angle. 22. Def. An acute angle is one which is less than a right angle. Acute angle. Obtuse angle. 23. Def. An obtuse angle is one which is greater than a right angle. Example... | |
 | Franklin Ibach - 1882 - 208 σελίδες
...angles with each other. 21. An Acute Angle is one which is less than a right angle; as angle a. 22. An Obtuse Angle is one which is greater than a right angle; as angle ABC. -о ELEMENTS OF PLANE GEOMETRY. 23. oblique Linea are lines which are not perpendicular... | |
 | Franklin Ibach - 1882 - 208 σελίδες
...equal, each is a right angle. 20. Perpendicular Lines are Such as make right angles with each other, 21. An Acute Angle is one which is less than a right angle; as angle a. 22. An Obtuse Angle is one which is greater than a right angle; as angle ABC. Acute and... | |
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An ACUTE ANGLE is one which is less than a right angle ; as the angle DEF. 
