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Verified answer
Bab SegitigaMatematika SMP Kelas VII
Pada sisi BC, dicerminkan, maka BA = BA'
sudut BAC = sudut BA'C = 60°
maka, segitiga AA'C = segitiga sama sisi
AC = AA' = 24 cm
AB = 1/2 . AC
AB = 1/2 . 24
AB = 12 cm
BC = √(AC² - AB²)
BC = √(24² - 12²)
BC = √(576 - 144)
BC = √(432)
BC = √144 . √3
BC = 12√3 cm
24÷2 =>> 12
60 : 20 =>> 3
Adi 12√3 cm