Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 56
e edge of the ruler onA and slide the ruler around untilhe same edge falls on B. Then,with a pen, or pencil, draw theine AB. B TROBLEM IV. To bisect a given line: that is, to divide it into two equal parts. Let A B be the given line to bedivided. With iasa centre, andradius greater than half of… … £N. 56 G E O M E T R Problems. For, draw the radii AI, AEBI, and BE. Then, since theseradii are equal, the triangles A IEpnd B1E have all the sides of theone equal to the corresponding sidesof the other ; hence, iheir corresponding angles are equal (Bk I. Th. viii) ; that is, the angle A IE is…
Geometry · Plane trigonometry
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