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" A Right Angle is that which is made by one line perpendicular to another. Or when the angles on each side are equal to one another, they are right angles. "
A Treatise on Mensuration, Both in Theory and Practice - Page 2
by Charles Hutton - 1788 - 703 pages
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Mathematics: Compiled from the Best Authors and Intended to be the ..., Volume 1

Mathematics - 1801
...cutting, if both be produced. .13. An angle is f <- inclination, l>r opening, of two lines, hsving different directions, and meeting in a point. 14. Angles are right or oblique, acute or obtuse* 15. A right .'-. Sri'tiKif, which is made by one line perpendicular to an-* other. Or...
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Mathematics, Volume 1

Samuel Webber - Mathematics - 1808
...tangential, or a tangent, to another, when it touches it without culling, if both be produced. 1 3. An angle is the inclination, or opening, of two lines,...having different directions, and meeting in a point. 341 15. A right angle is that, which is •made by one line perpendicular to another. Or when the angles...
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A Course of Mathematics ...: Composed for the Use of the Royal Military ...

Charles Hutton - Mathematics - 1811
...line or circle is Tangential, or "af \ Tangent to a circle, or other curve, when it y^x touches it, without cutting, when both are produced. 13. An Angle...a point. 14. Angles are Right or Oblique, Acute or Obtuse. 1 5. A Right Angle is that which is made by one line perpendicular to another. Or when the...
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A Course of Mathematics: In Two Volumes : for the Use of Academies ..., Volume 1

Charles Hutton - Mathematics - 1816
...equal. 12. A line or circle is Tangential, or a Tangent to a circle, or other curve, when it touches it, without cutting, when both are produced 13. An Angle...having different directions, and meeting in a point. U Angles are Right or Oblique, Acute or Obtuse. 15. A Right Angle is that which is made by one line...
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A Course of Mathematics: For the Use of Academies, as Well as Private Tuition

Charles Hutton - Mathematics - 1818
...equal. 12. A line or circle is Tangential, or a Tangent to a circle, or other curve, when it touche* it, without cutting, when both are produced. 13. An Angle...a point. 14. Angles are Right or Oblique, Acute or Obtuse. 15. A Right Angle is that which is made by one line perpendicular to another. Or when the angles...
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A Course of Mathematics: For the Use of Academies, as Well as Private ...

Charles Hutton - Mathematics - 1822
...equal. 12. A line or circle is Tangential, or a Tangent to a circle, or other curve, when it touches it, without cutting, when both are produced. 13. An Angle...a point. 14 Angles are Right or Oblique, Acute or Obtase. 15. A Right Angle is that which is made by one line perpendicular to another. Or when the....
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A treatise of practical mensuration

Anthony Nesbit - Measurement - 1824 - 434 pages
...lines. ' 9. A solid is a figure of three dimensions, namely, length, breadth, and thickness. < 10. An angle is the inclination or opening of two lines,...having different directions, and meeting in a point, which is called the angular point, as at A; and when three letters are used, the middle one denotes...
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An Introduction to Ancient and Modern Geography: To which are Added Rules ...

Jacob Abbot Cummings - Cartography - 1825 - 204 pages
...touches a circle, or part of A circle, without cutting it when produced. DEFINITIONS. 185 An angle is the opening of two lines, having different directions, and meeting in a point. A right angle is that which is made by a line perpendicular to another. 1 An oblique angle is one that...
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A New and Easy Introduction to the Mathematics: Containing. A system of ...

Ira Wanzer - Arithmetic - 1831 - 396 pages
...ihehypothenuse ; thti next longest side the base , and the shortest side the perpendicular. Base. * An angle is the inclination or opening of two lines,...having different directions, and meeting in a point. Thus, in the above right nngled triangle ABC, an i iiglu is formed by the meeting of the two lines...
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The Mechanic's Calculator, Or Workman's Memorial Book, Etc

William Grier - Mechanical engineering - 1832 - 300 pages
...12. A line or circle is Tangential, or is a Tangent to a circle or other curve, when it touches it, without cutting, when both are produced. 13. An Angle...a point. 14. Angles are Right or Oblique, Acute or Obtuse. 15. A Right angle is that which is made by one line perpendicular to another. Or when the angles...
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