Exercises on Euclid and in modern geometry for the use of schools, private students, and junior university students (1881)
McDowell, James L · Cambridge, Deighton, Bell, and Co. · leaf 114
base angles ACB and ABC, andBD is the difference of the sides. Therefore the triangle ABChas the given base, given difference of sides, and given differenceof base angles. Q. E. F. Def. I shall sometimes call drawing a line, which shallbe equal to a given straight line, from a given point to agiven… … Let BC be the given base. Draw CE, making the angle BCEequal to half the given difference ofbase angles, and draw CF perpendi-cular to CE. From B inflect to CFthe straight line BF equal to thegiven sum of sides, and let BF andCE meet in D. Bisect BF in A, andjoin AC. ABC is the required tri-angle…
Geometry
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