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Right Square

Author: mathforces
Problem has been solved: 0 times

Русский язык | English Language

In square $ABCD$ points $M$ and $N$ lie on the sides $AD$ and $AB$ respectively. Lines $BM$ and $CN$ intersect at point $R$ such that $BR=6$, $NR=7$ and $\angle BRN = 90$. What is the area of the square?

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