a.) I What three points determine planes M, N and O?

The planes M, N, and O can be determined by any three non-collinear points on each plane. In other words, for plane M, three points A, B, and C that are not on a straight line can determine the plane. For plane N, three different points D, E, and F that are not on a straight line can determine the plane. And for plane O, three points G, H, and I that are not on a straight line can determine the plane.

b.) What are the intersections of planes M & N; planes N & O; and planes M & O?

The intersections of planes M and N, planes N and O, and planes M and O will depend on the relative positions of the planes in relation to each other.

• If planes M and N intersect, their intersection will be a line (assuming they are not parallel).
• If planes N and O intersect, their intersection will also be a line (assuming they are not parallel).
• If planes M and O intersect, their intersection will be a point (assuming they are not parallel).

If any of the planes are parallel, they will not intersect and there will be no intersection line or point.

[tex]\\\[-Tricia[/tex]