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Jawab23.
<KLN + <NLM = 180
3x + 15 + 2x + 10 = 180
5x + 25= 180
5x= 180- 25
5x= 155
x = 31
<KLN = 3x + 15
<KLN = 3(31) + 15
<KLN = 108
Besar Pelurus <KLN = 180 - 108 = 72