What is always true about the sum of the angles in a triangle in euclidean geometry (regular geometry)?

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.