 | George Albert Wentworth - Geometry - 1877 - 416 pages
...determine the position of a _L to the middle point of A B. § GO QE >. PROPOSITION XXIII. PROBLEM. 221. At a given point in a straight line, to erect a perpendicular to that line. R ~ 77 0 Let 0 be the given point in the straight line A B. It is required to erect a... | |
 | George Albert Wentworth - 1881 - 266 pages
...determine the position of a _L to the middle point of A B. § 60 QEF PROPOSITION XXIII. PROBLEM. 221. At a given point in a straight line, to erect a perpendicular to that line. R -B НО Let 0 be the given point in the straight line AB. It is required to erect a... | |
 | Evan Wilhelm Evans - Geometry - 1884 - 170 pages
...extremities of another line, the first line is perpendicular to the second at its center. PROBLEM II. At a given point in a straight line, to erect a perpendicular to that line. SOLUTION.—Let AB be an fy indefinite straight line, and / \ C the given point in it.... | |
 | George Albert Wentworth - Arithmetic - 1886 - 392 pages
...the base edge, ACfhe perpendicular edge, and _B(7the hypotenuse. 1 FIG. 10. O FIG. 11. 349. PROBLEM. At a given point in a straight line to erect a perpendicular to this line, with the aid of a set-square. Place a ruler so that its edge will coincide with the straight... | |
 | Andrew Wheeler Phillips, Irving Fisher - Geometry - 1896 - 276 pages
...47°, what is BXD, and what is m ?• In Fig. 3, if m is 33°, what are the arcs BXD and BYD f 571547 212. CONSTRUCTION. At a given point in a straight...Join OA and produce to meet the circumference at X. BX\s the perpendicular required. Proof. — Angle ABX is inscribed in a semicircle, and therefore a... | |
 | Andrew Wheeler Phillips, Irving Fisher - Geometry - 1896 - 554 pages
...is 47°, what is BXD, and what is m ? In Fig. 3, if ;« is 33°, what are the arcs BXD and BYD i I 212. CONSTRUCTION. At a given point in a straight...perpendicular to AB at B. With any convenient point 0 as a centre, and OB as a radius, describe a circumference cutting AB at A and B. Join OA and produce... | |
 | George Albert Wentworth - Mathematics - 1896 - 68 pages
...circumference, is measured by one-half the difference of the intercepted arcs. PROBLEMS .OF CONSTRUCTION. 271. At a given point in a straight line, to erect a perpendicular to that line. 272. From a point without a straight line, to let fall a perpendicular upon that line.... | |
 | George Washington Hull - Geometry - 1897 - 408 pages
...and D. Hence PE is perpendicular to CD at its middle point. PROPOSITION XXXI. PROBLEM. §25. QEF 192. At a given point in a straight line, to erect a perpendicular to that line. Given—P a point in the straight line AB. Required—To erect a perpendicular to AB... | |
 | James Howard Gore - Geometry - 1898 - 232 pages
...the three postulates already given (25). PROBLEMS IN CONSTRUCTION. PROPOSITION XIII. PROBLEM. 182. At a given point in a straight line to erect a perpendicular to tltat line. F.ADCEB Let C be the given point in the line AB. To erect a perpendicular to AB at C.... | |
 | Webster Wells - Geometry - 1898 - 284 pages
...Note. For additional exercises on Book II., see p. 222. \ CONSTRUCTIONS. PROP. XXVII. PROBLEM. 203. At a given point in a straight line to erect a perpendicular to that line. . First Method. A. DC Given C any point in line AB. EB Required to draw a line _L to... | |
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At a given point in a straight line to erect a perpendicular to that line. Let AB be the straight line, and let c D be a given point in it. 
