Question

please answer this question step by step explanation​

Answer 1

Answer:

perimeter = 76/5

length of 2 sides = 11/2 and 7/2

perimeter = s1 +s2+s3

76/5 = 11/2+7/2+x

x = 76/5-11/2-7/2

x = 162-55-35/10

x = 72/10m

x = 7 2/10