This document discusses a multi-step process involving several mathematical operations and geometric shapes. Specifically, it describes calculating areas and perimeters of rectangles and triangles, finding unknown side lengths, and using formulas to solve for variables. The goal is to break a problem down into discrete steps and apply the appropriate equations at each step to arrive at a solution.

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4 ~~~~~~~~~~~~~~~~~~~~~~~~~~------ - 4 ~ ---------
- --- ( &
---- - - - - - -
~ ~~IIIIII~~~~~~~~~hm~~~~~~~ ------- I------
~~ ~ 2
7-7~~V.