However, for the lines to be parallel, the distance between the lines always stays the same. Perpendicular lines meet at a right angle. A right angle is a quarter turn, which is 90 degrees (90˚).

Player 1 gets a point for every pair of parallel lines they can find in the room. Player 2 gets a point for every pair of perpendicular lines they can find. The player with the most points wins!

Golf equipment marketing tends to simplify complex concepts. For example, this oversimplification creates a tidy equation in ...

The team demonstrated that the soft ring robot could travel along tracks as thin as a human hair, or as thick as a straw.

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A team of engineers from the Department of Mechanical and Aerospace Engineering at North Carolina State University (NC State) ...

While the popping crease is the marker for the bowler's front foot and runs perpendicular to the pitch, the return creases are the long lines that run parallel to the pitch and sit on either side ...