Looking for name of property of mathematics | Mathematics | Page 1

Hello, what is the name of the property of mathematics that allows the screenshot to be true? It is used in this 3blue1brown video at 8:07- https://youtu.be/BaM7OCEm3G0?list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab

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3Blue1Brown

Why the formula for cross products matches the geometric intuition.
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For anyone who wants to understand the cross-product more deeply, this video shows how it relates to...

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#Looking for name of property of mathematics