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Kelas 8 MatematikaBab Teorema Pythagoras
Pada segitiga ACD
sudut ACD = 180° - 90° - 45°
Sudut ACD = 45°
Maka, segitiga ACD adalah segitiga siku-siku sama kaki
AD = AC = 8 cm
CD = AD √2
CD = 8√2 cm
Pada segitiga ABC
Sudut ACB = 180° - 90° - 30°
Sudut ACB = 60°
Maka,
BC = 2 . AC
BC = 2 . 8
BC = 16 cm
AB = √(16² - 8²)
AB = √(256 - 64)
AB = √192
AB = 8√3 cm
BD = AB - AD
BD = (8√3 - 8) cm