N-gon angles

What is the sum of interior angles 9-gon? What is the internal angle of a regular convex 9-polygon?

Result

sum of angles:  1260 °
interior angle:  140 °

Solution:

Solution in text sum of angles:=
Solution in text interior angle:=

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To solve this example are needed these knowledge from mathematics:

Try conversion angle units angle degrees, minutes, seconds, radians, grads.

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