alleryCoplanar lines have:
ANever
BCommon plane (intersect or are parallel)
CRandom
DNo common plane
Answer & Solution
Correct answer: B. Common plane (intersect or are parallel)
Two lines coplanar if they lie in a common plane.
Either intersect at a point or are parallel.
**Test:** scalar triple product [b₁ × b₂] · (a₂ - a₁) = 0.
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