Eunits
what is the height of the trapezoid?
3 units
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12 units
asap need

noncoplanar points are points that do not lie on the same line.

you need to rotate this triangle about the origin 270 degrees clockwise to create the full square.

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."