Also called "vertical recording," Toshiba and Seagate introduced perpendicular recording drives in the 2005-2006 time frame. Other vendors followed, and densities reached 400 gigabits per square ...

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 ...

Perpendicular lines meet at a right angle. A right angle is a quarter turn, which is 90 degrees (90˚). Right angles are sometimes shown with a small square where the lines meet. Perpendicular ...