Are lines of symmetry for any given polygon also diagonal?

What is the area of triangle abc if a = 8, b = 11, and c = 15?

If jaime wants to find 60% of 320, which table should he use?

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.