In triangle ABC, the external squares ABDE and BCFG are constructed on sides AB and BC, respectively. If the length of segment EF is 10 units, what is the area of quadrilateral ACGD?

**Problem 1538**

A triangle's gift,

External squares reveal all,

Quadrilateral found.

If you're interested in finding more poems with a focus on geometry, you may enjoy this collection: More geometry thematic poems.

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