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Why can’t one of the names be PNM, or MPN for the plane? But MNP can? What’s the difference, and why?

Why cant one of the names be PNM or MPN for the plane But MNP can Whats the difference and why class=

Respuesta :

The names PNM and MPN are perfectly valid. The order of the letters doesn't matter. In fact, there are 6 ways to name this plane if we just use the 3 letters. If we include "plane Z", then there are 7 total ways to name the plane.

For some reason, your teacher wants P to be the third letter as s/he mentioned MNP and NMP. But again, the order doesn't matter.

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