Elements of geometry : containing books I to III (1886)
Smith, J. Hamblin · Toronto : W.J. Gage · leaf 35
ects us to regard an angle as the inclination oftwo straight lines to each other, which meet, not in the samr straight line. Thus he does not recognise the existence of a single angleequal in magnitude to two right angles. The words printed in italics are omitted as needless, inDef. viii., p. 3,… … Then, when QP has reached the position represented inthe diagram, we Bay that it has described the angle EQP.When QP has revolved so Ear a Ide with QW, iy that it has described an angle equal to two rightangle*. 11 * -1 we may obtain an easy proof of Prop, xm, ; for what ever tlir position of PQ…
Geometry
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