A) 11 m
B) 10m
C) 12m
D) 5m
Correct Answer: A
Solution :
Perimeter of a triangle \[={{1}^{st}}side+{{2}^{nd}}side+{{3}^{rd}}side\] So, \[20=5+4+{{3}^{rd}}\]side \[{{3}^{rd}}side=20-9=11m.\]You need to login to perform this action.
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