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 Bøker Bok 1–10 av 110 på ... When a straight line standing on another straight line, makes the adjacent angles...
... When a straight line standing on another straight line, makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it. 11. An obtuse angle...
Geometrical and Graphical Essays: Containing a General Description of the ... - Side 1
av George Adams - 1813 - 534 sider
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## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward - 1747 - 480 sider
...is, AC, and C J5, are Perpendicular to £> C, as well as -D, C is to /•j'r/W or both of them. g. An OBTUSE ANGLE is that which is greater than a Right Angle. Such is the Angle included between the Lines AC and n CB. 10. An ACUTE ANGLE is that ^_ which is lefs...
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## The philosophical and mathematical commentaries of Proclus ... on the first ...

...and the infifting Right Line, is called a PERPENDICULAR to that upon which it ftands. DEFINITION Xf. An OBTUSE ANGLE is that which is greater than a RIGHT ANGLE. DEFINITION XII. But an ACUTE ANGLE, is that which is Icfs than a RIGHT ANGLE, THESE are the triple...
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## The shipwright's vade-mecum [by D. Steel].

David Steel - 1805
...is the angle of ABC. " I An (tht use Angle is that which is greater than a right A ' angle, as ABC. An Acute Angle is that which is less than a right angle, asDBC. By an ANGLE of ELEVATION is meant the angle contained between a line of direction, and any plane...
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## A New and Enlarged Military Dictionary: Or, Alphabetical Explanation of ...

Charles James - 1805 - 1006 sider
...side, and consequently the arches intercepted either way are equal to 90°, or the quarter of a circle. An Acute ANGLE, is that which is less than a right angle, or 90°. An Obtuse ANCLE, is that whicb is greater than a right angle. Adjacent ANGLES, are such as...
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## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1806 - 320 sider
...denotes the Angle I. An Obtuse Angle is that which is greater than a right Angle, as CAB, (Fig 3.; An acute Angle is that which is less than a right Angle, »s DCB, (Fig. 4.) A Superficies or Surface, is an Extension of two Dimensions, viz. Length and Breadth....
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## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1806 - 311 sider
...perpendicular to it. _____ VIII, Book I. An obtuse angle is that which is greater than a right angle. IX. An acute angle is that which is less than a right angle. X. A figure is that which is inclosed by one or more boundaries. XL A circle is a plane figure contained...
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## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid, Robert Simson - 1806 - 518 sider
...right angle ; and the straight line which stands on the other is called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is less than a right anp-Ic. • XIII. rt A term or boundary is the...
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## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1814
...called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is less than a right angle. Xlll. " A term or boundary is th\$ extremity of any thing." XIV. A figure is that which is inclosed...
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## A Treatise on Surveying, Containing the Theory and Practice: To which is ...

John Gummere - 1814 - 346 sider
...ADC and B'DE are called right angles, and the line CD is said to be perpendicular to AB, Fig. 4. 10. An acute angle is that which is less than a right angle, as BDE, Fig. 4. 11. An obtuse angle is that which is greater than a right angle, as ADE, Fig. 4. 13....
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## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1815 - 320 sider
...placed at the angular point being always wrote in the middle, as A DC (Fig. 4.) denotes the angle b. An obtuse angle is that which is greater than a right angle, as CAB (Fig. 3.). An acute angle is that which is Iess than a right angle, as DCB(Fig.4.). Parallel...
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