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Continued Or, Arithmetically, Thus: [calculations] Angle CAB = EDF EDF subtracted from 180 is equal to ADC. Then in the triangle ADE, we have the sides AD & DE with their included angle, to find the side AE [calculations] half the sum of EAD & AED [calculations] of the 2 unknown angles

Ques. 3d. I want the length of a line by which my gardener may strike out a round orangery that shall contain just one acre. [calculations] Ans, 27 3/4 yards