8. The medians of a right triangle which are drawn from the vertices of the acute angles are 5 cm and 2√10
Determine its hypotenuse.
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Answer:
In △ABC,
AE and CD are the medians of the triangle.
So, AE=6 and CD=8
Hence, BE=EC=21BC and AD=DB=21AB
In △ABE
AE2=AB2+BE2
∴36=AB2+41BC2 ....(1)
In △BCD
CD2=DB2+BC2
∴64=41AB2+BC2 ....(2)
Adding (1) and (2), we get
100=45(AB2+BC2)
∴AC2=80
∴AC=45 cm

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