Geogebra
ABC is an equilateral triangle.
E is a point on AB where DE ⊥ AB
F is a point on BC where DF ⊥ BC
G is a point on AC where DG ⊥ AC
DF : DE : DG = 1 : 2 : 4
If the area of DEBF is 13, what is the area of ABC ?
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