Answers

2014-06-01T12:02:59+05:30
We can say two lines are perpendicular to each other if the angle between the two lines is 90 degrees .
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2014-06-01T12:35:11+05:30
We can say a line perpendicular to other when they both makes an angle of 90 degeres
it's nothing hard o you can say a straight line to other having a right angle we denote it with the sign 
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