 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.  Annual Report - Page 361868Full view - About this book
 | Great Britain. Admiralty - Geometry - 1846 - 128 pages
...are adj. /.s, "|and CH _L AB. Therefore, the J_ CH has been drawn, &c. PROP. XII. THEOR. 13. 1 EU. The angles which one straight line makes with another...one side of it, are either two right angles, or are toffether equal to two right angles. Let AB make wilh DC, on the same side of it, L s DBA, ABC; then... | |
 | Dennis M'Curdy - Geometry - 1846 - 168 pages
...prop. 8, (c) def. 10. 13 Th. The angles (ABC, ABD), made by one straight line (AB) with another (CD), upon one side of it, are either two right angles, or are equal to two right angles. ABD, are equal to one another, they are right angles (a); if unequal, from... | |
 | Euclides - 1847 - 128 pages
...its extremity, the 31st Prop, of Book III. must first be proved. 35 PROP. XIII. THEOR. GEN. ENUN. — The angles, which one straight line makes with another...two right angles, or are together equal to two right angles. PART. ENUN. — Let the st. line AB make with CD, upon one side of it, Fig. 1. the Zs CBA,... | |
 | John Playfair - Euclid's Elements - 1847 - 340 pages
...given point C a perpendicular CH has been drawn to the given straight line AB. PROP. XIII. THEOR. i The angles which one straight line makes with another upon one side of it, art either two right angles, or are together equal to two right angles. Let the straight line AB make... | |
 | J. Goodall, W. Hammond - 1848 - 390 pages
...1. Define a circle, a triangle, an isosceles triangle, and and an equilateral triangle. Prove that the angles, which one straight line makes with another...two right angles, or are together equal to two right angles. 2. The angles at the base of an isosceles triangle are equal to each other. 3. Define parallel... | |
 | Great Britain. Council on Education - Education - 1848 - 596 pages
...Section 1. 1. Define a circle, a triangle, an isosceles triangle, and an equilateral triangle. Prove that the angles, which one straight line makes with another...two right angles, or are together equal to two right angles. 2. The angles at the base of an isosceles triangle are equal to each other. 3. Define parallel... | |
 | Euclides - 1848 - 52 pages
...to a given straight line of an unlimited length, from a given point without it. PROP. XIII. THEOREM. The angles which one straight line makes with another...two right angles, or are together equal to two right angles. PROP. XIV. THEOREM. If, at a point in a straight line, two other straight lines, upon the opposite... | |
 | Great Britain. Committee on Education - 1848 - 606 pages
...1. 1. Define я circle, a triangle, an isosceles triangle, and an equilateral triangle. Prove that the angles, which one straight line makes with another...two right angles, or are together equal to two right angles. 2. The angles at the base of an isosceles triangle are equal to each other. 3. Define parallel... | |
 | Elias Loomis - Conic sections - 1849 - 252 pages
...to each other. be proved that the angle ACD is equal to the angle EGH, PROPOSITION II. THEOREM. 77/o angles which one straight line makes with another,...two right angles, or are together equal to two right angles. if not, suppose the line BE to be drawn from the point B, perpendicular to CD; then will each... | |
 | Euclid, Thomas Tate - 1849 - 120 pages
...'Which was to be done. PROP. XIII. THEOR. The angles which one straight line makes with another upon the 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 are... | |
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