A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 46
Problem 8.— To inscribe a circle in a given triangle. 100. Let ABC (Fig. 24) be thegiven triangle. Bisect two of itsangles A and B by the lines AD,BD, cutting in D. Then will D bethe centre. (4.4.) Problem 9.—To describe a circle about a given triangle. Fig. 25. 101. Bisect two of the sides, as…
Surveying
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