It can be reasonable to say that Wes would need 2 fluid ounces. But actually personally I think he would need more because that is 0.25 in cups. But it also depends on how many potato wedges he has too.
If vertex angle is 42, and the base angles are congruent, this is an isosceles triangle, they each measure: 180-42/2. They each measure 69 degrees. The length of sides don't matter.
