Sum of inner angles

Prove that the sum of all inner angles of any convex n-angle equals (n-2) . 180 degrees.

Correct answer:

d =  0

Step-by-step explanation:

n=3s3=180° n=4s4=s3+180° n=5s5=s4+180° s=180n360=180(n2) d=0=0



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