The lengths of three sides of a triangle is y cm,ycm and 6cm.its perimeter is 20 cm.find y.
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to find the perimeter of any geometry means we have to find the length of boundary of given geometry
According to question
y+y+6=20
2y=20-6
2y=14
y=7
According to question
y+y+6=20
2y=20-6
2y=14
y=7
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