Respuesta :

Answer:

x = 9 yd

Step-by-step explanation:

Using Pythagore

x² + 12²= 15²

x² + 144 = 225

x² = 225 - 144

x² = 81

x = √81

x = 9 yd

Hope you could understand.

If you have any query, feel free to ask.

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