4 to the 18th power is the answer to your question.
Answer: a = 40, b = 50, c = 115
Solution:
a = 40 (the vertical angles are equal)
b = 180 - 40 - a = 50 (the sum of interior angles of triangle is 180)
c = 180 - 65 = 115 (the linear theorem)
It is irrational. Otherwise sqrt(2) would be rational too which is not true.
