Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 108
plane, isthe replica of the other,in its plane. Conse-quently, the two parab-olas differ only in thescale to which they aredrawn, and are, there-fore, similar. The details of the proof just outlined can be supplied at once by showing that the triangles FPM and MFE are similar, respectively, to FPM… … Fig EXERCISES 01. Take a sheet of squared paper and mark D along one ofthe vertical rulings near the edge of the paper. Choose Fat a distance of 1 cm. from D. Then the points of the locuson the vertical rulings — or on as many of them as one desires— can be marked off rapidly with the compasses.…
