The line about which a three-dimensional figure is rotated to obtain an object identical to the original is a(n) horizontal plane.
plane of symmetry.
reflectional axis.
axis of symmetry.

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =