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April 20, 2014

April 20, 2014

Posted by **nicole 4th grade** on Sunday, February 24, 2013 at 7:53pm.

- math -
**bobpursley**, Sunday, February 24, 2013 at 8:03pmthree separate lines can be perpendicular, if you are considering three dimensional space, like on your table. One pencil laying on the table, a second pencil on the table perpendicular to the first, and a third pencil pointing straight up (not laying on the table, as you are holding it upwards.

So if you consider three lines in the same plane, as laying on your table, two of them can be perpendicular, but it is impossible to put a third pencil on the table perpendicular to both of the first two.

- math -
**Ms. Sue**, Sunday, February 24, 2013 at 8:04pmThese are parallel lines:

||||||||||||

These are two perpendicular lines:

+

Do you see why we can only have one pair of perpendicular lines?

- math -
**nicole 4th grade**, Sunday, February 24, 2013 at 8:31pmThank You very much

- math -
**Ms. Sue**, Sunday, February 24, 2013 at 8:35pmYou're very welcome.

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