Perpendicular Planes

Pronunciation: /ˌpɜr pənˈdɪk yə lər pleɪnz/ ?

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Manipulative 1: Intersecting planes

Two planes are perpendicular planes if the dihedral angle between the planes is a right angle, is 90° = π/2 rad.

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Perpendicular Planes. 2010-10-28. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/p/perpendicularplanes.html.

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2010-10-28: Initial version (McAdams, David.)

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