SOLUTION: Prove That The sum of all the iterior angles is equal to two right angler?

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Question 1117061: Prove That The sum of all the iterior angles is equal to two right angler?
Answer by ikleyn(52914) About Me  (Show Source):
You can put this solution on YOUR website!
.
See the lesson
    - Sum of the interior angles of a triangle
in this site.

The proof is there.