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" 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. "
Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ... - Página 3
por Euclides - 1860
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Euclid's plane geometry, practically applied; book i, with explanatory notes ...

Euclides - 1863
...angle EDC? arc eg, of angle EDO, &c. A degree is the 300th part of the circumference of a circle. 10. When a straight line standing on another, straight line makes the adjacent angles equal to each other, each of these angles is called a right angle; D and the straight line which stands on the...
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Euclid's Elements of geometry, the first four books, by R. Potts. Corrected ...

Euclides - 1864
...the angle ABI), or DBA ; and that which is contained by DB, CB, is called the angle DEC, or CBD. X. When a straight line standing on another straight...the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight line which stands on the other is called a...
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The school edition. Euclid's Elements of geometry, the first six books, by R ...

Euclides - 1864
...15.) therefore the angle FHC is equal to the angle GHC; (I. 8.) and these are adjacent angles. But when a straight line standing on another straight...the adjacent angles equal to one another, each of them is a right angle, and the straight line which stands upon the other is called a perpendicular...
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Elements of plane geometry, book i, containing nearly the same propositions ...

Euclides - 1865
...lines which meet in a point, called the vertex of an angle, and the two lines are called its sides. 9. When a straight line standing on another straight line makes the adjacent angles equal, each of them is called a RIGHT ANGLE; and the straight line which stands upon the other is called a...
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The College Euclid: Comprising the First Six and the Parts of the Eleventh ...

Euclides - 1865
...therefore the angle AFE is equal to the angle BFE ; (I. 8) but 'when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of them is a right angle ; (i. def. 10) therefore each of the angles AFE, BFE, is a right angle; wherefore...
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Loftus's Inland Revenue Officers' Manual: a guide to the duties and ...

William Harris JOHNSTON - 1865
...other angle between them, such as the angles ВАС and DA 0. When one straight line standing upon another straight line makes the adjacent angles equal to one another, each such angle is called a right angle, and either of the straight lines is said to be a perpendicular...
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An English primer; compiled under the superintendence of E.C. Lowe

Edward Clarke Lowe - 1866
...two straight lines to one another, which meet together, but are not in the same straight line. 10. When a straight line standing on another straight...the adjacent angles equal to one another, each of these angles is called a right angle; and the straight line which stands on the other is & perpendicular...
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The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1867 - 400 páginas
...from the centre G ; [I. Definition 15. therefore the angle ADG is equal to the angle BDG. [I. 8. But when a straight line, standing on another straight...adjacent angles equal to one another, each of the angle's is called "a right angle ; [I. Definition 10. therefore the angle BDG is a right angle. But...
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A course of geometrical drawing

William Schofield Binns - 1881
...straight lines to one another, meeting or cutting each other in a point, as (10) "When a straight lino standing on another straight line makes the adjacent...stands on the other is called a perpendicular to it." The angles AB c, A n D, are right angles. Obi. 1 . Because DB is in the same straight line with B c,...
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Class lessons on Euclid

Marianne Nops - 1882
...than a right angle, called acute (Lat. acutus, sharp). These are thus defined by Euclid : — 10. ' When a straight line standing on another straight...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...
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