perpendicular
Two lines are perpendicular if they meet at a right angle, 90°.
The picture opposite shows a red line and a blue line. The red line is perpendicular to the blue line.
In this triangle, side a and side b are perpendicular.
Two lines are perpendicular if they meet at a right angle, 90°.
The picture opposite shows a red line and a blue line. The red line is perpendicular to the blue line.
In this triangle, side a and side b are perpendicular.