The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners (1847)
Byrne, Oliver, Whittingham, Charles, 1795-1876, Chiswick Press · London : William Pickering · leaf 105
inedby a ftraight line and the part of the circum-ference it cuts off. VII. An angle in a fegment is the angle con-tained by two ftraight lines drawn from anypoint in the circumference of the fegmentto the extremities of the ftraight line whichis the bafe of the fegment. VIII. An angle is faid to…
Euclid's Elements · Geometry
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