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Mapel : Matematika

Kelas : 8
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Gunaka Teorema Pythagoras :

c² = a² + b²

40² = (4n)² + (3n) ²

1600 = 16n² + 9n²

1600 = 25n²

1600/25 = n²

64 = n²

√64 = n

8 = n

Nilai n = 8 cm → Opsi B