Unformatted text preview: △ A ′ B ′ C ′ , with vertices A ′ = proj P ′ A , B ′ = proj P ′ B , and C ′ = proj P ′ C . What is the relation between the oriented areas of these two triangles? Let P be the plane containing △ ABC and let −→ n be the unit vector (normal to P ) such that V A ( △ ABC ) = A −→ n where A is the area of △ ABC . If the two planes P and P ′ are parallel, then △ A ′ B ′ C ′ is a parallel translate of △ ABC , and the two oriented areas...
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 Fall '08
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 Calculus, P perpendicular

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