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A right pyramid VABCD has a square base ABCD of side 4. The slant edge VA, VB, VC and VD are #2 sqrt 5# m long
(a) Calculate:
(i) The height of the pyramid
(ii) The angle between the plane VAB and the base ABCD
(b) C` and D` are midpoint of VC and VD respectively. Calculate the angle between the planes ABCD and A’B’C’D’.