Describe the simplest way to find the total surface area of a cube. pleas hurry

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?