ABCDV is a solid glass pyramid. The base of the pyramid is a square of side 3.2 cm. The vertical height is 2.8 cm. The vertex V is directly above the centre O of the base   (a)     Calculate the volume of the pyramid. (b)     The glass weighs 9.3 grams per cm3. Calculate the weight of the pyramid. (c)     Show that the length of the sloping edge VC of the pyramid is 3.6 cm. (d)     Calculate the angle at the vertex, . (e)     Calculate the total surface area of the pyramid.

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