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#1

$Old$ January 13th, 2009, 05:15 PM

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in a 50 word response how can you determine if two lines are perpendicular?

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#2

$Old$ January 13th, 2009, 05:20 PM

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in a 50 word response how can you determine if two lines are perpendicular?

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Their gradients have a product of -1.

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#3

$Old$ January 13th, 2009, 07:48 PM

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in a 50 word response how can you determine if two lines are perpendicular?

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Originally Posted by Prove It $View Post$

Their gradients have a product of -1.

That's only six words (seven if you count ha ha the number).

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#4

$Old$ January 13th, 2009, 07:49 PM

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That's only six words (seven if you count ha ha the number).

Well I do want the OP to do SOME research Mr F :P

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