Everyday Triangle Problem

Geometry Level 4

A triangle ΔABC\Delta ABC has side lengths of 55, 77 and 99 units respectively.

ADBC AD \perp BC is drawn. Similarly, BEAC BE \perp AC is drawn.

Find the length of DEDE to 2 decimal places.

Note: The image given is just for reference and not to be scaled. The actual figure may vary.

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