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diketahui
BK' = 3
AK' = √AB² + BK'²
= √4² + 3²
= √16 + 9
= √25
= 5
KK' = 1 cm
AK = √AK'² + KK'²
= √5² + 1²
= √25 + 1
= √26
LF = √LE²²+ EF²
LF = √3² + 4²
LF = √9 + 16
= √25
= 5
FG = 1 cm
LG = √LF² + FG²
= √5² + 1²
= √25 + 1
= √26