Analyze the diagram below and complete the instructions that follow. Given that BC is a midsegment of ZYA, find BC. A. BC = 3.7 B. BC = 4.5 C. BC = 9 D. BC = 18

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?