Hi, hello, and welcome to today’s brief beauty history lesson (I promise no pop quizzes): Contouring, baking, and extreme highlighting didn't come from your BFF who's, like, super into makeup. It ...

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. 2D shapes can be found printed in a book or you can draw them on a piece of paper. 2D shapes have sides and corners (also ...