a) Area= Base x Height
we are given the base of 3m and the height of 7m. multiply to get your answer.
3m x 7m = 21m
Area = 21m
for perimeter you will add all the sides up. make sure to fill in blank spots on one side with the answers from the other side. what i mean is 9.5 is listed on one side but not the other so you would put it over on the other side as well and add it in. exclude the height. It is not used in perimeter if it is not a side length.
3m + 9.5m + 3m + 9.5m = 25m
Perimeter = 25m