HURRY PLEAS...? What is the definition of an angle? A. A part of a line starting at a particular point and extending indefinitely in one direction. B. To rays sharing a common endpoint. C. All points between and including two endpoints. D. The set of all points that a fixed distance from a given point.

How can you decide witch operations to use to slice a two step equation

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.