Original post by Don'tKnowAName
cosine rule
Original post by Don'tKnowAName
If it was a right-angled triangle then the 26cm side must be the hypotenuse since it's the longest side. So try using Pythagoras' and see if the theorem works for this triangle.
Original post by Notnek
If it was a right-angled triangle then the 26cm side must be the hypotenuse since it's the longest side. So try using Pythagoras' and see if the theorem works for this triangle.
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