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The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it, the angles CBA, ABD : these shall either be...
Elements of Geometry: Containing the First Six Books of Euclid, with a ... - Side 21
av John Playfair - 1847 - 317 sider
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## Elements of plane geometry, book i, containing nearly the same propositions ...

Euclides - 1865
...FGH. PROPOSITION V. THEOR. The angles which one straight line makes with another on one side of it are either two right angles, or are together equal to two right angles. Let the straight line CD make with AB on the same side of it the angles ACD and BCD, these are either two right angles, or...
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## An Introduction to Plane and Spherical Trigonometry

Alfred Challice Johnson - 1865 - 150 sider
...(Eue. L, 5, б.) 2. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles, or 180°. (Eue. I., 13.) 3. If two straight lines cut one another, the vertical or opposite angh-s...
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## Half-hour examination papers, for daily use

John Robertson (LL.D., of Upton Park sch.) - 1865 - 144 sider
...parallel lines. [KC] 38. The angles which one straight line makes with another upon one side of it, are either two right angles or are together equal to two right angles. [KC] 39. The straight lines which join the extremities of two equal and parallel straight lines towards...
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## Loftus's Inland Revenue Officers' Manual: a guide to the duties and ...

William Harris JOHNSTON - 1865
...upon one tide of it, as the angles с Ъ d and а Ъ d, or abe and с Ь e, in the figure above, are either two right angles, or are together equal to two right angles. An angle greater than a right angle is called an obtuse angle. An angle less than a right angle is...
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## The College Euclid: Comprising the First Six and the Parts of the Eleventh ...

Euclides - 1865
...of Straight Lines. 1. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles .... ... I. 13. 2. If, at a point in a straight line, two other straight lines, upon the opposite sides...
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## Report ... on the common school system of the United States and of the ...

...to the proposition : The angles which one straight line makes with another, upon one side of it, are either two right angles, or are together equal to two right angles. 3. Prove that the angles at the base of an isosceles triangle are equal. 4. Prove that if, from a point...
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## The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1867 - 400 sider
...THEOREM. The angles which one straight line makes with another straight line on one side of it, either are two right angles, or are together equal to two right angles. Let the straight line AB make with the straight line CD, on one side of it, the angles CBA, ABD : these either are two right angles, or...
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## The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1867 - 400 sider
...THEOREM. The angles which one straight line makes with another straight line on one side of it, either are two right angles, or are together equal to two right angles. Let the straight line AB make with the straight line CD, on one side of it, the angles CBA, ABD : these either are two right angles, or...
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## Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1868 - 410 sider
...PROPOSITION XIII. THEOREM. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to...with CD, upon one side of it, the angles CBA, ABD. Then these shall be either two right angles, or, shall be together, equal to two right angles. E A...
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## Annual Report

1868
...base shall be equal 30 2. The angles which one straight line makes with another upon one side of it are either two right angles or are together equal to two right angels 20 3. Any two sides of a triangle are together greater than the third side 20 4. In obtuse-angled...
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