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A plane and a line having an angle of 90 degrees between them are called _____

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in Mathematics - Class 12 by (687k points)
A plane and a line having an angle of 90 degrees between them are called _____

(a) Orthogonal

(b) Tangential

(c) Normal

(d) Parallel

I had been asked this question in semester exam.

My doubt stems from Three Dimensional Geometry in portion Three Dimensional Geometry of Mathematics – Class 12

1 Answer

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Best answer
Correct choice is (a) Orthogonal

Easiest explanation: A plane and A line which are perpendicular to each other or a plane and a line having an angle 90 degrees between them are called orthogonal. θ is equal to 90 degrees in sin θ=\(\frac {a1a+b1b+c1c}{\sqrt {a^2+b^2+c^2} \sqrt{a1^2+b1^2+c1^2 }}\).

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