 | Herbert Edwin Hawkes, William Arthur Luby, Frank Charles Touton - Geometry, Modern - 1920 - 328 pages
...Acute angle. An acute angle is an angle less than a right angle. 74. Obtuse angle. An obtuse angle is an angle greater than a right angle and less than two right angles. 75. Corollary 4. The two acute angles of a right triangle arc complementary. 76. Corollary 5. If two... | |
 | Marquis Joseph Newell - 1920 - 424 pages
...a straight angle, they are called supplementary angles. One is called the supplement of the other. An angle less than a right angle is called an acute angle. Exercise 78 1. Two angles are supplementary and one is twice the other. F.md the number of degrees... | |
 | Joseph Clifton Brown, Albert Clayton Eldredge - Arithmetic - 1924 - 346 pages
...piece of paper in half, and crease. The crease will be perpendicular to the edges that it joins. vv An angle less than a right angle is called an acute...An angle greater than a right angle, and less than the sum of two right angles, is called an obtuse angle. Acute Angle Fig. 16 Hold two of your fingers... | |
 | Arthur Warry Siddons, Reginald Thomas Hughes - Geometry - 1926 - 202 pages
...DEFINITIONS Acute angle, obtuse angle, reflex angle. An angle less than a right angle is said to be acute ; an angle greater than a right angle and less than two right angles is said to be obtuse ; an angle greater than two and less than four right angles is said to be reflex.... | |
 | Linda Bostock, Ewart Smith - Juvenile Nonfiction - 1991 - 364 pages
...angle that is smaller than a right angle is called an acute angle. Any angle that is greater than one right angle and less than two right angles is called an obtuse angle. Any angle that is greater than two right angles is called a reflex angle. EXERCISE 9d What type of... | |
 | L. Bostock - Juvenile Nonfiction - 1996 - 484 pages
...direction i\s positive and the clockwise direction as negative ) Any angle that is greater than one right angle and less than two right angles is called an obtuse angle. Any angle that is greater than two right angles is called a reflex angle. 41 POINTS Parallel and Perpendicular... | |
 | C. Layne - Juvenile Nonfiction - 1997 - 340 pages
...angle that is smaller than a right angle is called an acute angle. Any angle that is greater than one right angle and less than two right angles is called an obtuse angle. Any angle that is greater than two right angles is called a reflex angle. What type of angle is each... | |
 | 352 pages
...22 ; they are all equal, for when folded they fitted on one another. Such angles are right angles. An angle less than a right angle is called an acute angle. • An angle greater than a right angle is called an obtuse angle. HEx. 94. Make a right angle BOC as in Ex. 93; cut it out and fold so that... | |
 | 102 pages
...22 ; they are all equal, for when folded they fitted on one another. Such angles are right angles. An angle less than a right angle is called an acute angle. An angle greater than a right angle is called an obtuse angle. Ex. 94. Make a right angle BOC as in Ex. 93 ; cut it out and fold so that... | |
 | Thomas Tate (Mathematical Master, Training College, Battersea.) - 1860 - 404 pages
...90 equal angles, each of these angles is called a degree. 25° is the abbreviation for "25 degrees." An angle less than a right angle is called an acute angle. An angle greater than a right angle is called an obtuse angle. UEx. 62. What fractions of a right angle are the angles between the hands... | |
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An angle less than a right angle is called an acute angle; an angle greater than a right angle and less than two right angles is called an obtuse angle. 
