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Step-by-step explanation:
XM=1/2 LM = 6/2=3cm( bcoz x is midpt. of LM)
YN=1/2 LN=5/2= 2.5 cm ( bcoz y is midpt of LN)
XY=1/2 MN=11/2=5.5cm(bcoz of basic promotional ity theorem)
so, perimeter=XY+MN+XM+YN=3+5.5+2.5+11=22m.
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