Posted by **Shadow** on Wednesday, October 6, 2010 at 10:42pm.

Determine whether the following statements are always,sometime, or never true.Explain

1.Three points determine a plane.

2.The intersection of two planes can be a point.

1.Never true, the three points must be noncollinear.

2.Never true, the intersection of two planes is a line.

(Are these answers right?) Thanks

- Math -
**Reiny**, Wednesday, October 6, 2010 at 10:58pm
1. 3 points do determine a plane, unless the 3 points are collinear, so "sometime"

2. they form a line, unless they are parallel, but never in a point

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