To become proficient in geometry, students must learn about a variety of lines and angles. One important concept is understanding ...

Why not see how much you know about this topic already? Then work through the page and see if you can beat your score. Parallel ...

Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom ...

Whether you are sketching graphs in mathematics, understanding directions in geography, or reading blueprints in design class ...