Cross Product

OK, WikiIsNotaDictionary, but there seem to be a few math definitions around.

The CrossProduct of two vectors is a vector perpendicular to both which has a length equal to the area of the parallelogram defined by them, and points in a direction such that it obeys the right-hand rule. That makes the CrossProduct anti-commutative.

• a x b = -b x a
• (ka) x b = k(a x b)
• a x a = 0

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What do you get if you cross a sheep with a kangaroo?

A woolly jumper

What do you get if you cross a mountaineer with a mosquito?

Nothing - you can't cross a scalar and a vector.

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CategoryMath