Geogebra

Geometry Level 4

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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