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Euclidean Theorem

  • Thread starter Dustinsfl
  • Start date
  • #1
699
5
What is the famous theorem in Euclidean geometry that states that the sum of the interior angles of a triangle is 180 degrees?
 
Last edited:

Answers and Replies

  • #2
33,507
5,192
AFAIK it doesn't have a name.
 
  • #3
699
5
Do you know what the theorem states?
 
  • #4
33,507
5,192
It says pretty much what you said - that the sum of the interior angles of a triangle is 180 degrees.
 
  • #5
699
5
How could use the theorem to determine the sum of the angles of a convex quadrilateral?
 
  • #6
Office_Shredder
Staff Emeritus
Science Advisor
Gold Member
3,750
99
Try connecting two opposite corners of the quadrilateral with a line
 

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