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" DBC, or CBD ; but, if there be only one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E. "
A course of practical geometry for mechanics - Page 8
by William Pease - 1843 - 68 pages
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1762 - 488 pages
...is named the angle ' ABD, or DBA ; and that which is contained by DB, CB is called ' the angle DBC, or CBD. but if there be only one angle at a point, ' it may be exprefled by a letter placed at that point; as the angle ' at E.' X. When a ftraight line ftanding...
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The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - Trigonometry - 1775 - 534 pages
...named the angle ABD, or DBA ; and that which is contained by DB, CB is * called the angle DBC,or CBD; but, if there be only one angle * at a point, it may be exprefled by a letter placed at that point; as the angle at li.' X. When a ftraight line flanding...
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The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 552 pages
...DB is named the angle ABD, or DBA ; and that which is contained by DB, CB is called the angle DBC, or CBD ; but, if there be only one angle at a point, it may be exprefled by a 'letter placed at that point; as the Angle at E.' .X. When a ftraight line flanding...
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1781 - 534 pages
...angle ABD, or DBA ; and that which i; ' contained by DB, CB is called the angle DBC, or CBD. bnt ' if there be only one angle at a point, it may be expreftcd by a ' letter placed at that point; as the angle at E.' X. When a ftraight line ftanding...
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Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...is ' named the angle ABD, or DBA ; and that which is coni tained by BD, CB is caUed the angle DBC, or CBD ; but, ' if there be only one angle at a point, it ma^ be exprefled ' by a letter placed at that point ; as the angle at E.' VII. •/ f * When a ftraight...
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The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - Trigonometry - 1799 - 374 pages
...is named the angle ABD, ' or DBA ; and that which is contained by DB, CB is called ' the angle DBC, or CBD ; but, if there be only one angle at ' a point, it may be exprefled by a letter placed at that point ; ' as the angle at E.X. When a ftraight line ftanding on...
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The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - Trigonometry - 1804 - 530 pages
...is named the angle ABD, or DBA; and that which is • contained by DB, CB is called the angle DBC, or CBD. but if there be only one angle at a point, it may be exprefled by a letter placed at that point ; as the angle at E.' X. When a ftraight line flanding...
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Elements of Geometry;: Containing the First Six Books of Euclid, with a ...

John Playfair, Euclid - Circle-squaring - 1804 - 468 pages
...BD is. named the angle ABD, or DBA ; and that which is contained by BD, CB is called the an^le DBC, or CBD ; but, if there be only one angle at a point, it may be expreffejl ' by a letter placed at that point ; as the angle at E.' VII. When -a ftraight line ftanding...
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Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Mathematics - 1806 - 320 pages
...is ' named the angle ABD, or DBA ; and that which is con' tained by BD, CB, is called the angle DBC, or CBD ; but, ' if there be only one angle at a point,...letter placed at that point ; as the angle at E.' VII. When a straight line standing on another straight line makes the adjacent angles equal to .one...
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1806 - 546 pages
...DB is named the angle ADB, or < DBA; and that which is contained by DB, CB is called the <angle DEC, or CBD ; but, if there be only one angle at a < point,...letter placed at that point; as < the angle at E.' X. When a straight line standing on another straight lii>e makes the adjacent angles equal to one another,...
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