Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 100
ed to describe a circle about it. , ° Bisect (9. 1.) the angles BCD.CDE by the straight lines CFjFD,and ^frorn the point F, in which theymeet, draw the straight lines FB, FA,FK to the points B, A, E. It may bedemonstrated, in the same manner as iaIhe preceding nroposition, that the an-^les CBA,… … 1«0 E1.EMENT« to FDC ; wherefore the side CF is equal (6. 1.) te the side FD: Inlike msDner it may be dptnoDstrafed, thai FB, FA, FE are each ofthem equal to FC, or FD: therefore the five straight line? FA, FB,FC, FD, FE are equal to one another; and the circle described fromthe centre F, at the…
Euclid's Elements · Geometry · Trigonometry
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