BC = 9 cm
AC = 12 cm
AB = ... cm
___________________
AB² = BC² + AC²
AB² = 9cm² + 12cm²
AB² = 81cm + 144cm
AB² = 225cm
AB = √225cm
AB = 15 cm
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Jwb:
BC = 9 cm
AC = 12 cm
AB = ... cm
___________________
AB² = BC² + AC²
AB² = 9cm² + 12cm²
AB² = 81cm + 144cm
AB² = 225cm
AB = √225cm
AB = 15 cm