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Shading is calculated on the summer solstice (June 21). Take the average of the shaded areas measured at 10:00 a.m., 12:00 p.m., and 3:00 p.m. 

To determine the shadow cast by a tree, average the shadow area cast by the three time of day shown in the diagram.

Shading is calculated on the summer solstice (June 21). Take the average of the shaded areas measured at 10:00 a.m., 12:00 p.m., and 3:00 p.m. 

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