What is the perimeter of the polygon in the diagram?

a) 2√(a-b)^2

b) 4(a+b)^2

c) 2(a^2 + b^2)

d) 4√(a^2 + b^2)

We are given a figure that is projected to be a rhombus that is a quadrilateral that has 4 equal sides. in this case, the length of the sides is equal to sqrt (a2 + b2) through the distance formula. There are four equal sides so the perimeter is equal to D) 4√(a^2 + b^2)

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3x+9+4x+x=8x+9that's the answer for your question.