Perpendicular lines meet at 90 degrees
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Because 90 degrees is half of a straight line. A straight line is equal to 180 degrees. 180 divided by 2 = 90.
A vertical line at 90 degrees
It is a straight line that intersects another line at 90 degrees
Construct a perpendicular line that intersects a horizontal line at 90 degrees and then bisect the vertical line with the horizontal line will give an obtuse angle of 135 degrees because 90 degrees+45 degrees = 135 degrees
A perpendicular line.