Respuesta :

Answer:

75

Step-by-step explanation:

Answer:

75 km

Step-by-step explanation:

Use the Pythagorean Theorem

c² = a² + b²

c² =  = 72² + 21²

c² = 5,184 + 441

c² = 5,625

Take the square root of both sides

c = 75 km

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