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When trying to prove two triangles congruent, you can use SSS, SAS, ASA, AAS, HL, and HA patterns. However, the pattern A S S doesn't work. Instead of spelling or saying this word in class, you can refer to it as "the donkey theorem". You can look at the pattern in the two triangles and say "these two triangles are not congruent because of the donkey theorem."
You CANNOT prove triangles incongruent with 'the donkey theorem', nor can you prove them congruent. It's mostly sort of a joke, you could say, but it's never useful.
The reason is that if the two triangles ARE congruent, then of course there will be an unincluded congruent angle as well as two congruent sides.
The theorem doesn't do anything left, right, forward or backward. It's not even really a theorem. :P
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Why is it that ssa congruence is called also as donkey theorem?
Because S S A backwards is A S S, which is a word that just happens to mean "donkey".
What was stated in the gougu theorem?
The gougu theorem was the Chinese version of the Pythagorean theorem, they stated the same principle
How do you prove theorem 3.6.1?
Theorem 8.11 in what book?
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Donkey Donkey
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The donkey is a vertebrate
