The diagram shows a prism ABCDEF.
The cross-section is a right-angled triangle BCD.
BD = 10 cm, BC = 5.2 cm and ED = 18 cm.
Calculate angle BEC.
Angle BEC = ...................................................
The point G lies on the line ED and GD = 7 cm.
Work out angle BGE.
Angle BGE = ................................................
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