A parallelogram the length of whose sides are 12cm and 8cm has one diagonal of 10cm long the length of the other diagonal is
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In parallelogram.
d21+d22=2(l2+b2)
d2+(10)2=2(64+144)
=> d2=2×208−100
=> d2=416-100=316
=> d=316−−−√
=> d=17.76 cm => d > 10
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