Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 198
prove — = -— = — = —. DK DE EF FD Argument 1. In rt. A ABH and DEK, A B — Ae. 2. ,\ AABH^ ADEK, o . ^H,oppositeZ ^_u4^,oppositeZ^g^* *z>ir, opposite Z^ Djs;, opposite Z^if/) . ^ . AB BC CA4. But = = —. 5. DE EF FDAH_AB_BC CADK^ DE~~ EF i(» D Q.E.D Reasons 1. §424,1. 2. §422. 3. §424,2. 4.…
Geometry, Plane · Geometry, Solid
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