 | F. A. Brining, D. N. Avasia - Mechanical drawing - 1913 - 282 pages
...DRAWING AND SURVEYING. Aj'E F' 8 3. To draw a perpendicular to a given line from a given point in the line. Let AB be the given line and C the given point. With C as centre and any convenient radius describe arcs, cutting AB in, E and F. With E and F as cen°tres... | |
 | Edward Rutledge Robbins - Geometry, Plane - 1915 - 280 pages
...BS (188). ... A^OS^A BOS (?). .'. Z AOS = Z BOS (?). QED PROPOSITION XXXIII. PROBLEM 257. At a fixed point in a straight line to erect a perpendicular to that line. Given: Line AB and point P within it. Required: To erect a line _L to AB at P. Construction : Using... | |
 | Fletcher Durell, Elmer Ellsworth Arnold - Geometry, Plane - 1917 - 330 pages
...passes into the eye (A) in a horizontal direction. H 154 THE CIRCLE PROPOSITION XXII. PROBLEM 250. At a given point in a straight line, to erect a perpendicular to that line. Given the point P in the line AB. To construct a _L to line AB at P. Construction. 1. Take any convenient... | |
 | Fletcher Durell, Elmer Ellsworth Arnold - Geometry, Solid - 1917 - 220 pages
...triangles are equal. 82. In an isosceles triangle, the angles opposite the equal sides are equal. 85. At a given point in a straight line, to erect a perpendicular to that line. • 86. Through a given point on a straight line, to draw a line making a given angle with the given... | |
 | Royal A. Avery - Geometry, Modern - 1925 - 360 pages
...parts. Make the construction accurately and leave all construction lines. Proposition IX. Problem 67. At a given point in a straight line to erect a perpendicular to the line. D r E Given: The line AB and the point P in the line. To construct a perpendicular to AB... | |
| |
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. 
