AstroRP
  • Member for 6 months
  • Last seen more than a week ago
9 answers
22 votes
4k views
Why do we introduce the notion that triangles are "congruent" instead of just saying that they are "the same" or "equal"?
3 votes

The problem is that there are different kinds of 'samenesses' (equivalence relations). One of these is congruency, but another is similarity. If you don't teach your students the word congruent, and ...

View answer