Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 206
For example, if Biwe draw AB equaland parallel to AB,BC equal and par- A A allel to BC, and so on, it is easily proved that. 1 BCD and ABC Ifare congruent. This may be done by ordinary superposition, orby sliding A BCD along the dotted parallels. There are many applications of this principle of…
Geometry
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