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Co-Prime Triangle
If in triangle $PQR, PQ=4, PR=7, \angle Q- \angle R=90°$, the approximate length of side $QR$ can be expressed as $\frac {a}{\sqrt b}$, where $a, b$ are coprimes. Find $ab$.
Geometry
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If in triangle $PQR, PQ=4, PR=7, \angle Q- \angle R=90°$, the approximate length of side $QR$ can be expressed as $\frac {a}{\sqrt b}$, where $a, b$ are coprimes. Find $ab$.
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