I need help on this question.....

[symone]

Plane X and plane Y each contain the point A. Is there a line containing A which is common to the planes?[/b]

 

[Guest]

Plane X and plane Y each contain the point A. Is there a line containing A which is common to the planes?[/b]

Geometry isn't my strength, but have you tried drawing it out?

 

[soroban]

Hello, symone!

Plane X and plane Y each contain the point A.
Is there a line containing A which is common to the planes?

I'll exclude the case where the two planes are coincident.

If two planes have a common point, they obviously intersect.
And two planes will intersect in a line containing the common point.

 

[symone]

Thank you
I understand it now