Mathematicians, it's a rainy day but Susanna Post, the 2021 Arkansas Teacher of the Year, is on the hunt. Can you help in her scavenger hunt to find examples of parallel and perpendicular lines? Rise ...

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

This article was updated May 5, 2023. It was originally published Sept. 24, 2009. Shaft keys—sometimes called sunk keys—transmit torque between shafts and shaft-mounted components such as gears or ...

Hyundai wants to turn parallel parking into perpendicular parking and perpendicular parking into pivot parking. The automaker's Hyundai Mobis division is developing a new type of four-wheel-steering ...

Self-parking cars are becoming increasingly popular as technology advances, and people look for ways to make their lives easier. After all, they can park themselves in parallel or perpendicular spots ...

After years of research, neuroscientists have discovered a new pathway in the human brain that processes the sounds of language. The findings suggest that auditory and speech processing occur in ...