1a.
**5** answ

1b.
**4** answ

Line segment MN

1c.
**4** answ

Ray ST.

1d.
**4** answ

2.
**4** answ

Collinear points are points all in one line, and coplanar points are points all in the same plane. Collinear points are also coplanar, but coplanar points are not necessarily collinear.

3.
**3** answ

4.
**3** answ

Another name for plane V is plane RTS.

5.
**3** answ

Points R, Q, and S are collinear.

Point W is not collinear with these points.

6.
**3** answ

Point W is not coplanar with R, S, and T.

7.
**4** answ

Yes, point W is coplanar with points Q and R because there exists a plane that these three points lie in.

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