Respuesta :

MathPhys

Answer:

c. 28

Step-by-step explanation:

Use Pythagorean theorem to find the leg of the right triangles.

a² + 12² = 15²

a² + 144 = 225

a² = 81

a = 9

So the value of x is:

x = 9 + 10 + 9

x = 28

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