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 Llibres Llibres 11 - 20 de 113 sobre ... angles is called a right angle ; and the straight line which stands on the other....
... 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 is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term...
Elements of Geometry: Containing the First Six Books of Euclid with a ... - Pągina 9
per John Playfair - 1855 - 318 pągines
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## Elements of arithmetic, algebra and geometry

George Lees - 1826 - 207 pągines
...two right angles. VJII. — An obtuse angle is that which is greater than a right angle. Book I. 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 Figures are said to be equivalent,...
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## Elements of Geometry, Containing the First Six Books of Euclid

Euclid, Phillips - 1826 - 180 pągines
...other is called a perpendicular. 11. An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term is the extremity of any thing. 14. A figure is that which is contained under one or more...
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## The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - 1827 - 513 pągines
...called a perpendicular to it. XL 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. XIII. " A term or boundary is the extremity of any thing." XIV. A figure is that which is enclosed...
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## Elements of the Geometry of Planes and Solids: With Four Plates

Ferdinand Rudolph Hassler - 1828 - 159 pągines
...obtuse angle, is that which is greater than a right angle. In figure 1, the angle ErfB, is an obtuse angle. 9. An acute angle, is that which is less than a right angle. In figure 1, the angle E.tfD, is an acute angle. 10 Figure, is any space terminated. (So figure 2 to...
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## The London Encyclopaedia: Or, Universal Dictionary of Science, Art ..., Volum 10

Thomas Curtis - 1829
...called a PERPENDICULAR. Fig. 4. 8. An OBTUSE ANGLE is that which is greater than a right angle. Fig. 5. 9. An ACUTE ANGLE is that which is less than a right angle. 'Fig. 6. 10. PARALLEL STRAIGHT LINES are such as are in the same plane, and which being produced ever...
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## An Introduction to Mensuration and Practical Geometry

John Bonnycastle - 1829 - 252 pągines
...other. 10. A right angle is that which is formed by two lines that are perpendicular to each other.* 11. An acute angle is that which is less than a right angle. 12. An obtuse angle is that which is greater than a right angle. PRACTICAL GEOMETRY. 15 13. A circle...
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## Elements of geometry: Being chiefly a selection from Playfair's geometry

John Playfair - 1829 - 186 pągines
...necessarily equal to one another, ED. 12. An obtuse angle is that which is greater than a right angle13. An acute angle is that which is less than a right angle. Note. An angle which is either acute or obtuse is often called an oblique angle. ED. 14. If two lines...
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## Introduction to Mensuration and Practical Geometry

John Bonnycastle - 1833 - 288 pągines
...A right angle is that which is formed by two line* that are perpendicular to each other.* .-. > il. An acute angle is that which is less than a right angle. 12. An obtuse angle is that which is greater than a righi angle. * Any angle differing from a right...
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## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1834
...that which is less than a right angle. XIII. " A term or boundary is the extremity of any thing." XIV. A figure is that which is enclosed by one or more boundaries. XV. A circle is a plane figure contained by one line, which is called the circumference, and is such,...
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## The Elements of Euclid: viz. the first six books, together with the eleventh ...

Euclid, Robert Simson - 1835 - 513 pągines
...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. XIII. " A term or boundary is the extremity of any thing." XIV. A figure is that which is enclosed...
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