How many degrees matches to the radian measure of π/2

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Combine the information in the problem and the chart using the average balance method to solve the problem.