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The angles which one straight line makes with another upon one side of i't, are either two right angles, or are together eqval to two right angles.
Elements of Geometry: Containing the First Six Books of Euclid, with a ... - Σελίδα 19
των Euclid, John Playfair - 1853 - 317 σελίδες
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## The school Euclid: comprising the first four books, by A.K. Isbister

Euclides - 1862
...angles, or are together equal to two right angles. (References— Prop. i. 11; ax. 1, 2; def. 10.) Let the straight line AB make with CD, upon one side of it, the angles CBA, ABD. Then the angles CBA, ABD are either two right angles, or are tog-ether equal to two right angles. First,...

## Study of Steam and the Marine Engine for Young Sea Officers in H.M. Navy ...

S. M. Saxby - 1862 - 179 σελίδες
...advantage. Book I. XIII. — The angles which one right line makes with another upon one side of it are either two right angles or are together equal to two right angles. Departing from the precise language of absolute and complete proof (for obvious reasons), we may say...

## The school edition. Euclid's Elements of geometry, the first six books, by R ...

Euclides - 1864
...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. Then these shall be either two right angles, or, shall be together, equal to two right angles. A E...

## Euclid's Elements of geometry, the first four books, by R. Potts. Corrected ...

Euclides - 1864
...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. Then these shall be either two right angles, or, shall be together, equal to two right angles. £ A...

## The college Euclid: comprising the first six and the parts of the eleventh ...

Euclides - 1865
...angles, or are together equal to two right angles. (References— Prop. I. 11; ax. 1, 2; def. 10.) Let the straight line AB make with CD, upon one side of it, the •ngles CBA, ABD. Then the angles CBA, ABD are either two right angles, or are together equal to two...

## Half-hour examination papers, for daily use

...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...

## An Introduction to Plane and Spherical Trigonometry

Alfred Challice Johnson - 1865 - 150 σελίδες
...versa. (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...

## Loftus's inland revenue officer's manual

William Harris Johnston - 1865
...another 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...

## 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...

## Report ... on the common school system of the United States and of the ...

...corollaries 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...