Respuesta :

akabane009

Answer:

AB can also be -5 since its square is also 25 but distance can't be negative so the answer is 5 kilometers.

Step-by-step explanation:

it is a right angled triangle.

h² = p² + b²

or, AB² = 4²+3²

or, AB²=16+9

or, AB² = 25

so, AB = 5

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