Tolong jawab pakai caranya ya plissssss

KL = KM = 2LM

Misalkan
KL = 2x
KM =2x
LM=x

2x + 2x + x = 30
5x = 30
x = 6

Maka panjang KM
KM =2x
KM=2(6)
KM=12 cm (C)