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L segitiga =
tinggi² = 6² - 3²
tinggi² = 36 - 9
tinggi² = 27
tinggi = √27 = 5.196
tinggi = 5.2
L segitiga =
L segitiga = 15.6
keliling = 6+6+6
keliling = 18cm
140.4
betul gak?