What is the measure of each angle in any equilateral triangle?

Because all the side lengths of an equilateral triangle are the same, their respective angles must also be the same.
180/3 = 60 degrees

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425

Iam guessing c. or d.