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MATH / We have a triangle △ABC and a point K on BC such that AK is an altitude to △ABC. If AC=9, BK=√(5), and CK=4, then what is AB? · Discussion

Discussing We have a triangle △ABC and a point K on BC such that AK is an altitude to △ABC. If AC=9, BK=√(5), and CK=4, then what is AB? · MATH

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