Use Pythagoras' theorem in 3D



Applications of Pythagoras theorem in 3D to find one of the sides in a right angled triangle. e.g. Diagonal through the centre of a cuboid given the 3 side lengths and a lead into the diagonal of the base. This can be done with a multiple application of Pythagoras in 2D or using the 3D formula for Pythagoras, a2 = b2+c2+d2. Also include the slanted height of the triangular faces of the side of a square based pyramid, found from the perpendicular height of the pyramid and the base side length
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