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Kelas 8 Matematika
Bab Teorema Pythagoras

x² + 8² = (3x)²
x² + 64 = 9x²
64 = 9x² - x²
64 = 8x²
x² = 64/8
x = √8
x = 2√2 cm

x²+8² = (3x) ²
x²+64 = 9x²
x²-9x²=64
8x² = 64
x² = 64/8
x² = 8
x =√ 8
x =2√2