If 4² + 5² + x² = 21², find x?

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4² +5² + x² =21²,ആയാൽ x കാണുക?

C10

D20

Answer:

4²+5²+ x² = 21² 16 + 25 + x²=441 x²=441-(16+25) x² = 400 x=20

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