for the first shape, the side EB is 15 - 9 = 6. using the Pythagorean theorem, we can solve for side CB.
EB^2 + CE^2 = CB^2
6^2+15^2 = CB^2
36+225 = CB^2
261 = CB^2
CB = sqrt261.
now, we can solve the perimeter.
9+15+15+sqrt(261) = 39 + sqrt261.
for the second shape, we can simply add all the sides.
4+12+14+12+4+9+6+9 = 70.
hope this helped! please correct me if i am wrong, or if you are confused about something:)
well, division is just multiplying something by the reciprocal of the other number.
so, 3/4 divided by 2 would also equal 3/4 times 1/2.
fraction multiplication is simply just multiplying the numerators together and the denominators together.
3/4 times 1/2 would be 3/8.
hope this helped! please correct me if i am wrong :)