1. 180 degrees
2.360 degrees
However, I'm not sure of the bottom two questions, mainly cause I've heard of exceptions, but I' not sure if they're true.
In a triangle there is 180 degrees so the three angles should add up to that.
The angles of a quadrilateral is always 360 degrees.
Yes it is possible to have a triangle that is not 180 degrees
No it is not possible.
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