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p. 84 no.10 (from Solid Mensuration: Understanding the 3D Space book by Earnhart)

Plane A which contains an isoceles right triangle forms a dihedral angle of 60 degrees with another plane B. If the hypotenuse of the triangle lies in plane B and measures 8 inches, find the distance from the vertex of the right angle to plane B, and the length of the projection of each leg of the triangle on plane B.

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