Respuesta :

gordon57

Answer:

The answer is 15 m.

Step-by-step explanation:

Answer:

b = 15

Step-by-step explanation:

Using Pythagoras' theorem on the right triangle, that is

20² + b² = 25²

400 + b² = 625 ( subtract 400 from both sides )

b² = 225 ( take the square root of both sides )

b = [tex]\sqrt{225}[/tex] = 15

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