How to simplify 504/5?

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Which of the following is the result of expanding the series

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext