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But although the new study emphasizes the rarity of aligned coplanar dwarf galaxies, such configurations have been observed before.

The second school suggested that all four wings were coplanar.

Since CE equals BE these directions are equally inclined to, and coplanar with, the normal to the mirror.

I believe the earth’s and moon’s orbits are more or less coplanar, but the earth’s axis tilts.

The proposition shows that the opposite corners of a room are parallel, and that therefore they lie in the same plane, or are coplanar, as is said in higher geometry.