Suppose that the function H is defined for all real numbers as follows

d

because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130