Comparing Planes In Exercises 69–74, determine whether the planes are parallel, orthogonal, or neither. If they are neither parallel nor orthogonal, find the angle between the planes.
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Determine whether the planes are parallel, perpendicular, or neither. If neither, find the angle between them.
Determine whether the planes are parallel, perpendicular, or neither. If neither, find the angle between them. (Round to onedecimal place.)
Comparing Vectors In Exercises 21–26, determine whether and are orthogonal, parallel, or neither.
