If you go out to eat, a good tip is $18 when the bill costs $100. What is this percent?

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

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?

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle