In triangle ABC, D and E are the midpoint of AB and AC respectively, then the area ratio of triangle ade to quadrilateral DEBC is ()

In triangle ABC, D and E are the midpoint of AB and AC respectively, then the area ratio of triangle ade to quadrilateral DEBC is (1:3)
Triangle ade is similar to triangle ABC, and the similarity ratio is 1:2
Then the area of triangle ade: the area of triangle ABC = 1:4
That is: Triangle ade area: quadrilateral DEBC area = 1: (4-1) = 1:3

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