Asquare is drawn inside a circle so that it's vertices touch the circle. if the radius of the circle is 15 cm, what is the perimeter of the square?

Select the number of ways in which a line and a circle can intersect

How is this equation completed? i cannot find any examples in the book.

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?