What are the two other name classifications of an equilateral triangle?

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces