caston1231 caston1231
  • 30-04-2017
  • Mathematics
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Аноним Аноним
  • 30-04-2017
We use the Pythagorean Theorem method.

a^2 + b^2 = c^2

9^2 + b^2 = 15^2

9^2 + 12^2 = 15^2

The length of side B is 12 cm
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