We can also convert from using Cartesian coordinates to using polar coordinates to describe the same point. For example, consider the point ( x , y ) = ( 7 , 3 ) shown in the following diagram. image Representing this point in polar coordinates requires determining (1) the point's distance from the origin and (2) the measure of the rotation angle counterclockwise from the 3 o'clock position. Let's start with the first part. Determining the point's distance from the origin utilizes the Pythagorean theorem. image Untried Complete the steps to use the Pythagorean theorem to find the exact and approximate values for the point's distance from the origin. r 2 = ( ) 2 + ( 3 ) 2 r 2 = + r 2 = 58 r