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LO = LN : 2 = 32 : 2 = 16 cm
KL = pakai cara phytagoras, akar dari KO*KO + LO*LO= 16*16 + 12*12 = akar 400 = 20
Jadi panjang kl : lm : mn : nk = 20 cm
maaf ya kalau berantakan hehe :)
b: 32:2=16
c: -