x=18
im not sure
Have a nice day
Answer:
Step-by-step explanation:
we know that
by the sum of interior angles of a triangle
so we have
we can simplify
and now we find the other angles
c
180(n-2)
180(5-2)
180(3)
540
4500 * 40÷100 = 1800
4500 + 1800 = 6300