Elements of geometry, containing books I and II with exercises and notes (1882)
Smith, J. Hamblin (James Hamblin), 1829-1901 · Toronto : Gage · leaf 36
en QP has revolved so far as to coincide with QW,we say that it has described an angle, c^wa? to two rightangles. Hence we may obtain an easy proof of Prop. xiii. ; for what-ever the position of PQ may be, the angles which it makeswith WE are together equal to two right angles. Again, in Prop. xv.… … Book I.] PROPOSITION XVI. 29 Proposition XAI. Theorem. 7/ OM side of a triangle be produced, the exterior angle isgreater than either 0^ the interior opposite angles. D 4 Let the side BC of a ABC he produced to D.Then must l ACB be greater than either _ CAB or L ABC.Bisect AC in E, and join BE. I.…
Geometry
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