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October 25, 2014

October 25, 2014

Posted by **Muja** on Sunday, March 23, 2014 at 1:33am.

- College Math -
**Steve**, Sunday, March 23, 2014 at 6:26amAB has direction (-3,4,1)

BC has direction (0,-2,6)

CD has direction (3,-4,-1)

DA has direction (0,-2,6)

So, AB || CD

and BC || AD

since the sides are parallel in pairs, they must have the same lengths in pairs (I trust you can verify this).

the area is just

|(b-a)x(d-a)|

where a,b,c,d are the vectors to the points A,B,C,D.

- College Math -
**Muja**, Sunday, March 23, 2014 at 7:01amthanks steve. u really help me out.. really appreciate it .. =)

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