What is the factor of 8ax-6x-12a+9

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)

The area of each triangle is 7 square units. the surface area of the triangular prism is

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.