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" An ACUTE ANGLE is one which is less than a right angle ; as the angle DEF. "
The Carpet-dealer's Guide: A Manual of Practical Information on the Art of ... - Página 13
por John H. Macke - 1891 - 228 páginas
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Elements of Geometry and Conic Sections

Elias Loomis - 1849 - 226 páginas
...other is called a perpendicular to it. 11. An acute angle is one which is less than a right angle. An obtuse angle is one which is greater than a right angle. in the same plane, and which, being produced 12. Parallel straight lines are such as are 13. A plane...
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An introductory treatise on mensuration, in theory and practice

John Radford Young - 1850 - 12 páginas
...sides beyond the vertex, be equal to it. 7. An ACUTE ANGLE is one which is less than a right angle. 8. An OBTUSE ANGLE is one which is greater than a right angle. Therefore, angles are of three kinds: — right, acute, and obtuse. 9. A PLANE TRIANGLE is a. figure...
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High School Arithemtic: Containing the Elementary and the Higher Principles ...

James B. Dodd - 1852 - 362 páginas
...a risht angle. CE AM An acute angle is one which is less than a right angle, as the angle CBE ; and an obtuse angle is one which is greater than a right angle, as the angle ABE. § 37§. One straight line is perpendicular to another when they form a right angle with each...
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High School Arithmetic

James B. Dodd - 1853
...is a right angle. Ji An acute angle is one which is less than a right angle, as the angle CBE; and an obtuse angle is one which is greater than a right angle, as the angle ABE. § 379. Two straight lines are parallel to each other when they are everywhere equidistant from...
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PLANE AND SOLID GEOMETRY

GEORGE R. PERKINS - 1856
...be perpendicular to each other. XIII. An Acute angle is one which is less than a right angle. XIV. An Obtuse angle is one which is greater \ than a right angle. XV. When the sum of two angles is equal to a right angle, they are called Complementary angles ; each...
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Elements of Geometry and Conic Sections

Elias Loomis - 1858 - 234 páginas
...other is called a perpendicular to it. 11. An acute angle is one which is less than a right angle. An obtuse angle is one which is greater than a right angle. 12. Parallel straight lines are such as are in the same plane, and which, being produced ever so far...
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Plane and Solid Geometry: To which is Added Plane and Spherical Trigonometry ...

George Roberts Perkins - 1860 - 443 páginas
...be perpendicular to each other. XIII. An Acute angle is one which is less than a right angle. XIV. An Obtuse angle is one which is greater \ than a right angle. XV. When the sum of two angles is equal to a right angle, they are called Complementary angles ; each...
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Elements of Plane and Spherical Trigonometry: With Practical Applications

Benjamin Greenleaf - 1862 - 490 páginas
...as the angle CAB. B D 16. An ACUTE ANGLE is one which is less than a right angle ; as the angle DEF. An OBTUSE ANGLE is one which is greater than a right angle ; as the angle EFG. E< -G B D Acute and obtuse angles have their sides oblique to each other, and are sometimes called...
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Elements of Geometry and Trigonometry: With Practical Applications

Benjamin Greenleaf - 1862 - 490 páginas
...CAB. -B D 16. An ACUTE ANGLE is one which is less than a right angle ; as the angle DEF. D An 0BTUSE ANGLE is one which is greater than a right angle; as the angle EFG. x G Acute and obtuse angles have their sides oblique to each other, and are sometimes called oblique...
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Elements of Geometry: With Practical Applications to Mensuration

Benjamin Greenleaf - 1863 - 320 páginas
...CAB. -B, D 16. An ACUTE ANGLE is one which is less than a right angle ; as the angle DEF. E' E. B D An OBTUSE ANGLE is one which is greater than a right angle ; as the angle EFG. x G Acute and obtuse angles have^ their sides oblique to each other, and are sometimes called...
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