klmama Posted October 31, 2012 Share Posted October 31, 2012 I assume different texts use different numbers for their definitions,etc., based on the order the definitions and theorems are introduced. Is that right? In TT Geometry, ch. 3, Theorem 4 states "Pairs of vertical angles are congruent (equal)." Will we ever need to know it's "Theorem 4," or is knowing the fact enough? Quote Link to comment Share on other sites More sharing options...
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