If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line. Science Examination Papers - Page 44by Great Britain. Education Department. Department of Science and Art - 1899Full view - About this book
| William Frothingham Bradbury - Geometry - 1880 - 260 pages
...therefore the sum of all the angles at the point B is equal to four right angles. THEOREM III. 47i If at a point in a straight line two other straight lines upon opposite sides of it .make the sum of tfie adjacent angles equal to two right angles, these two... | |
| Moffatt and Paige - 1881 - 176 pages
...trapezvum. What is the hypothesis, and what is the conclusion in the enunciation of the 5th proposition 1 2. If at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles ; then these... | |
| Isaac Sharpless - Geometry - 1882 - 286 pages
...+ABE=R+ABE, and ABD = EBD ~ABE=R- ABE. .-. (Ax. 2) ABC+ABD = 2R. 5 BD E Proposition 16. Theorem. — If at a point in a straight line, two other straight...on opposite sides of it, make the adjacent angles equal to two right angles, these two lines are in the same straight line. 28 two right angles ; then... | |
| Marianne Nops - 1882 - 278 pages
...DBA, ABC = Z. s CBE, EBD = two rt. L s. Wherefore the angles, &c. — QED PROPOSITION XIV., THEOREM 7. If at a point in a straight line two other straight lines, on the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight... | |
| College of preceptors - 1882 - 528 pages
...lines, parallelogram, angle in segment of a circle, rectilinear figure described about a circle. 2. If at a point in a straight line two other straight lines on the opposite sides of it m;ike the adjacent angles together equal to two right angles, these two straight... | |
| Education, Higher - 1882 - 498 pages
...and the angles contained by those sides also equal, the two triangles are equal in every respect. 4. If at a point in a straight line two other straight lines upon the opposite sides of it make the adjacent angles together equal to two right angles, these two... | |
| Education - 1883 - 658 pages
...equal in every respect. QED BL) 3. If ata point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles ; then these two straight lines shall be in one and the same straight line. Prop. 14, Bk. I. Needlework.... | |
| Euclid, Isaac Todhunter - Euclid's Elements - 1883 - 428 pages
...B " CKHM And because at the point H in the straight line GH, the two straight lines KH, HM, on the opposite sides of it, make the adjacent angles together equal to two right angles, KH is in the same straight line with HM. [I. 14. And because the straight line HO- meets the parallels... | |
| Euclides - 1883 - 176 pages
...the angles made by these lines taken consecutively, amount to four -:-'ht angles. PROP. 14. THEOR. If, at a point in a straight line, two other straight lines, on the opposite sides of it, make the adjacent angles together equal to two right angles, the two straight... | |
| Joseph Hughes - Education - 1883 - 578 pages
...hypothesis BD = DC, and AB = AC. .'. By prop. 4 the triangles ABD, ACD are equal in every respect. QED 3. If at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles ; then these... | |
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