Answer:
x = 40
Step-by-step explanation:
to find how many degrees a polygon has in total you can use the formula (s - 2) * 180 in which s means sides
there are 5 angles in this polygon so we can do (5 - 2) * 180
3 * 180 is 540 so this shape has 540 degrees in total
so when adding them together they should equal 540
72 + 3x + 4x + 89 + 99 = 540
then you combine like terms
7x + 260 = 540
and subtract
7x = 280
last divide
x = 40
that is your answer
