Math
Geometry
Problem 1013: Square, Line through the Center,
Perpendicular, Distance, Metric Relations. Level: School, College
The figure shows a square ABCD with a line EH through the center O. If
AE, BF, CH, and DG are perpendicular to EH, prove that AE2 + BF2 + CH2 +
DG2 = AD2.
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