An elementary treatise on geometry : simplified for beginners not versed in algebra (1833)
Grund, Francis J. (Francis Joseph), 1805-1863 · Boston : Carter, Hendee & Co. · leaf 45
pressionof the angle at C, the angles C and B must also be equal;that is, the two angles at the basis of the isosceles trianorleABC are equal: and the same can be proved of the twoangles at the basis of every other isosceles triangle. QUERY IV. If the three sides of one triangle are equal to the… … Q. How can you prove this, forinstance, of the two triangles ABCand ahc, in which we will supposethe side AB == ah, ACz=iac, BC r= he 7That you may easier find out yourdemonstration, I have placed thetwo triangles, as you see, along side of each other, with their bases, AB and ah, together,and have…
Geometry, Plane
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