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KL=√(-3)²+(5)²
KL=√9+25
KL=√34
LM=√(1-3)²+(-2-3)²
LM=√(-2)²+(-5)²
LM=√4+25
LM=√29
KM=√(-2-3)²+(3-3)²
KM=√(-5)²+(0)²
KM=√25+0
KM=√25
LM²=KM²+KL²-2KM.p
(√29)²=(√25)²+(√34)²-2.√25.p
29=25+34-2.5.p
29=59-10p
10p=59-29
10p=30
p=30/10
p=3
yeah !
akhirnya stelah lama ngetik dapat juga hasilnya
smoga bermanfaat yaa :)