The condition ( frac {a1}{a2} = frac{b1}{b2} = frac{c1}{c2} ) is fo – McqOptions

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1.	The condition ( frac {a1}{a2} = frac{b1}{b2} = frac{c1}{c2} ) is for the planes whose normals are _____ to each other.
A.	perpendicular
B.	parallel
C.	differential
D.	tangential
Answer» B. parallel

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