Elements of geometry, containing books I and II with exercises and notes (1882)
Smith, J. Hamblin (James Hamblin), 1829-1901 · Toronto : Gage · leaf 116
x., xi., xii. of Book I. give goodexamples of symmetrical constructions. Note 11. Euclid)s Proof of 1. 5. The angles at the hose of an isosceles triangle are equal to oneanother ; and if the equal sides be produced, the angles upon theother side of the hose shall be equal. Let ABC be an isosceles… … Then in t.% AFC, AGB, .- FA = GA, and AC=AB, and z i^./iC= z G^i5,.-. FC=GB, and z ^i^C= z AGB, and z J Ci?- . ABG. Again, •.• .^^=J.G^, of which the parts AB, AC are equal,.. remainder £^= remainder CG. Then in A s BFC, CGB,. BF=:^CG, and FC=GB, and z jBi^C- z CGB,.-. z i^.BC= z (?C5,, and z…
Geometry
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