Which of the following best describes the blue line in the image below?
ТР
A
B
A. The line constructed through point P that is parallel to line AB
B. The line constructed through point P that is perpendicular to
line AB
C. The line constructed through point P that intersects line AB at
two different points

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?