Question

suppose a line intersecting two planes A and B FORMS A RIGHT ANGLE AT EXACTLY ONE POINT IN EACH PLANE. WHAT MUST BE TRUE ABOUT PLANES A AND B?

Answer 1

If that line is perpendicular to both the planes ⇒  that line is normal of two planes
⇒ those two planes A and B are parallel to each  other

hope u'll get it through diagram  below

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