Sum of inner angles

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

Your answer:



Help us improve! If you spot a mistake, please let let us know. Thank you!







You need to know the following knowledge to solve this word math problem:

algebraplanimetrynumbersUnits of physical quantitiesthemes, topicsGrade of the word problem

 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions: