BBC4 年
Parallel and perpendicular lines
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˚).
BBC4 年
Parallel and perpendicular lines
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˚).