If you add all the sides toeghter youll get 132 so if you gotta show your work then just write this 36+30+21+12+15+18=132 i hope that answers your question
you multiply the top number by the second top number and the bottom number by the second bottom number so 7 x 7 = 49 and 4 x 3 = 12, so the answer is 49/12
