To become proficient in geometry, students must learn about a variety of lines and angles. One important concept is understanding parallel, perpendicular, and intersecting lines. These lines are basic ...

Higher - The gradients of two perpendicular lines will always multiply to make –1. Make sure you are familiar with finding the equation of a line and calculating gradient to understand equations of ...

Susanna Post explains a strategy for remembering the difference between parallel and perpendicular lines. In addition, she demonstrates the meanings of parallel and perpendicular lines by showing real ...