tolong ya teman2 pake cara terimakasih

keliling persegi = 4 x (1/ √3 + 1)
= 4/(√3 + 1)
= 4 x (√3 - 1) /2
= 2 (√3 - 1)

di rasional kan dulu
1/akar3+1=akar3-1/akar3-1
akar3-1/2

kll = 4xsisi
kll = 4xakar3-1/2
kll = 2(akar3-1)