Perpendicular lines make four 90 degree angles otherwise known as right angles.
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Right angles are formed by perpendicular lines. If the lines would extend, to make two intersecting lines.
Perpendicular lines
Perpendicular lines always intersect and make 90 degree angles. Parallel lines never intersect with each other.
There is only one set of perpendicular lines in a right triangle; the horizontal line and the vertical line that make it 90 degrees.
Lines that form a 90 degree angle at their vertex. Two lines that make a 90 degree are perpendicular.