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
86 EXERCISES ON EUCLID [124. The angles CAE and FAE are equal (I. 4), and the angle ACBis equal to the sum of the angles ADC and CAD (I. 32), andHAB is equal to the sum of the angles ABC and ADC. There-fore, since ADC is a known angle, and the difference of the anglesACB and ABC is given, the…
Geometry
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