 | Horatio Nelson Robinson - 1853 - 334 lehte
...PROBLEM 1 . To Used a given finite straight line. Let AB be the given line, and from its extremities, A and B, with any radius greater than the half of AB (Post. 3), describe arcs, cutting each other in n and m. Join n and m; and (7, where it cuts ABf will... | |
 | William Somerville Orr - 1854 - 534 lehte
...describe arcs cutting each other in the point D. ^ith the same centres, and less equal radii, also greater than the half of AB, describe arcs cutting each other in the point Ь ; join DE, and produce the line until it cuts AB in C, which will be the point of bisection... | |
 | Richard Burchett - 1855 - 164 lehte
...ELEMENTARY PROBLEMS то SECTION I. FIGS. 1 and 2. To bisect a line AB, either straight or curved. From A and B, with any radius greater than the half of AB, describe arcs cutting each other in с and d. From с draw a right line to d, and it will bisect line AB. FIG. 3. To draw a line perpendicular... | |
 | Peter Nicholson - 1856 - 518 lehte
...To bisect a given straight line, AB, by a perpendicular. From the points A and B, with any distance greater than the half of AB, describe arcs cutting each other in C and D ; join CD. and this line will bisect AB perpendicularly. n PROBLEM 6. 143. From a given point,... | |
 | Horatio Nelson Robinson - 1878 - 564 lehte
...PROBLEM I. To bisect a given finite straight line. Let AB be the given line, and from its extremities, A and B, with any radius greater than the half of AB, describe arcs, cutting each other in n and m. Join n and m ; and C, where it cuts AB, will be the middle of the line required. Proof, (th.... | |
 | William R. Maguire - 1890 - 460 lehte
...Neatness and care in drawing c geometrical figures should be impressed upon the students ; the object of such practice is to secure accuracy, which can...will bisect the line A B." Now, although that is the •B simplest problem in practical geometry, we can perhaps understand how much better and clearer... | |
 | Arnold Lupton - 1902 - 494 lehte
...Practical Geometry. (1) To bisect a line AB (Fig. 72) ; that is, to divide it into two equal parts. From A and B, with any radius greater than the half of AB, describe arcs cutting each other in c and d. From r draw a straight line to d, and it will bisect the line AB. (2) To draw a line perpendicular... | |
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... they leave the room, but by drawing on the blackboard before their eyes, or by setting the students themselves to draw, the geometric figures which they may hereafter need to construct in real work. Neatness and care in drawing geometrical figures-... 