 | Walter Hamilton (M.R.A.S.) - 1825 - 474 σελίδες
...blunt, not pointed, in opposition to acute or sharp. OBT OCH OBTUSE ANGLE. In Geometry, if the contained angle be less than a right angle, it is called an acute; if greater, it is called an obtuse angle. OBUMBRATION (from obrumbo, Lat.) In Astronomy, the art of... | |
 | William Bentley Fowle - 1849 - 108 σελίδες
...angle, because the opening will only be the same part of a great circle that it was of a small one. (9) (10) Imagine two lines which cross each other...turned upward, downward, to the right, and to the left. % 23. Make a triangle, (fig. 11.) Close the space between the sides of an angle with a right 'line,... | |
 | D. M. Knapen - 1849 - 300 σελίδες
...ABC, or the angle at B, in the above figure, is a right angle. If the space included between two lines be less than a right angle, it is called an acute angle ; but if the space be greater than a right angle, it is called an obtuse angle. The rules for drawing... | |
 | John Weale - 1859 - 622 σελίδες
...Obtuxe, in geometry, blunt ; in opposition to acute or sharp Obtuse angle. In geometry, if the contained angle be less than a right angle, it is called an acute; if greater, it is called an obtuse angle. Obttae -angled triangle, a triangle which has an obtuse angle... | |
 | Benjamin Silliman - 1859 - 750 σελίδες
...Isosceles Triangle has two equal sides which may contain either a right, an acute or obtuse angle ; if the angle be less than a right angle it is called an acute triangle, if greater, an obtuse triangle. The unequal side of an isosceles triangle is called the base.... | |
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If the angle be less than a right angle, it is called an acute angle ; if more, it is called an obtuse angle. 