Use a Riemann sum with n=3rectangles to estimate the area under the curve f(x)=x^2on the interval [2,8]Get the heights from the midpoints.

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

Ithink the answer is b i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you