Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 124
will be parallel to each other … 12 1 G E () M E T R Y Of Planes THEOREM XJ. If two angles, not situated in the same plane, have their sidejparallel and lying in the same direction, the angles will br>equal. Let the angles ACE and BDFhave the sides AC parallel to BD,and CE to DF: then will the angleACE be equal to the angle…
Geometry · Plane trigonometry
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