11CB1_ A PERPENDICULAR LINE TO A PLANE

In space, given the point 𝑂 and a plane (𝑃). How many lines passing through the point O and are perpendicular to plane (𝑃)?

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In space, given the point 𝑂 and  a line 𝑑. How many planes passing through the point O and are perpendicular to the line d?

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