Question

Does the sum of the interior angles in a concave quadrateral equal 360

Answer 1

yes

Answer 2

Thanks

Answer 3

you could test this with a piece of paper and some scissors
cut a concave quadrilateral, rip off the corners and see if they all fit in the concave area

Answer 4

If this were drawn perfect
would it be

270
15
15
60

Answer 5

just divide the quadrilateral into two triangles and you will have your answer as follows: