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Mathematics, 26.05.2021 02:50 alexandraparava

OABCD is a square based pyramid of side 4 cm as shown in the diagram. The vertex D is 3 cm directly above X, the centre of square OABC. M is the midpoint of AB.

(a) Find the length of XM

(b) Calculate the length of DM

c) Calculate the angle between the face ABD and the base OABC.


OABCD is a square based pyramid of side 4 cm as shown in the diagram. The vertex D is 3 cm direct

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