I need help with my Benchmark Assessment
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Find the value of x for which the lines are parallel.

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²