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Which one of the following is true about perpendicular lines?

a. they intersect at one point
b. they intersect to form an acute angle.
c. they intersect to for an obtuse angle.
d.they never intersect.

User Cyrax
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so the perpendicular lines intersect at one point so choice a. is right sure 
User Evan Hobbs
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The answer to this question is A


User Ansar Maleki
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