Samantha and Mia are 13 km apart from each other.
<h3>What is Pythagoras theorem?</h3>The Pythagorean Theorem states that the sum of the squared sides of a right triangle equals the length of the hypotenuse squared.
As Mia walked 7km/h and she is 7 km north of Julia's house.
and, Samantha walked 11km/h and she is 11 km west of Julia's house.
The points where Mia and Samantha are after 1 hour as shown in figure, and Julia's house forms a right angled triangle.
the distance between the girls is shown by, hypotenuse of triangle
Using Pythagoras theorem,
H=
H= 13.038
H= 13 Km
They are 13 km apart from each other.
Learn more about Pythagoras theorem here:
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