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sqdancefan
Points B, C, D, T, and U are all on the face containing points C and T. The plane can be named using any 3 of these letters. One appropriate choice is
  CUB

Answer:

the ans is CUB

Step-by-step explanation:

line joining pts C n T on the plane of CBD

on that plane, there are 5 pts: C, B, D, T n U

any 3 of those pts will form a plane containing C n T

as the choices are:

CUB , ACE ,BED , ABE

the ans is CUB

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