Once similarity is established, the real fun begins: using proportions to find unknown lengths. The principle is simple: ...

Right Triangles: One angle is 90 degrees, and additional information is provided. Let's explore how to solve each of these ...

Your Vox Membership goes further this holiday season. When you buy an annual membership, we’ll give one to someone who can’t afford access. It’s a simple way for you to support Vox’s journalism and ...