 | M.J. Tipler, K.M. Vickers - Juvenile Nonfiction - 1996 - 368 pages
...OF ANGLES A right angle is a ^ turn. k A straight angle is ay turn. An acute angle is smaller than a right angle. An obtuse angle is greater than a right angle but smaller than a straight angle. A reflex angle is greater than a straight angle but less than a... | |
 | Anthony Nesbit - Measurement - 1859 - 482 pages
...lines which are perpendicular to each other. 13. An acute angle is less than a right angle, as CAB. 14. The complement of an angle is what it wants to complete a right angle, as the angle DAB is the complement of the angle CAB. 15. An obtuse angle is greater than a right angle,... | |
 | Arithmetic - 1926 - 264 pages
...side of a straight line. A right angle equals 90° or £ a straight angle. An acute angle is less than a right angle. An obtuse angle is greater than a right angle. The instruments used in making plans and drawings to scale are the drawing board, ruler, т square, triangle,... | |
 | William Henry Blythe - 1900 - 228 pages
...two sides. Let these arcs meet in A. Then ABD is the required triangle. An acute angle is less than a right angle. An obtuse angle is greater than a right angle. An acute-angled triangle has three acute angles. A right-angled triangle has a right angle. SIMPLE... | |
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An acute angle is less than a right angle. An obtuse angle is greater than a right angle. 
