Question 578026
It is a right triangle w/ a=1, b=.5, to find c:

c^2 = a^2 + b^2            take the square root of both sides

c= {{{sqrt(1^2 + .5^2)}}} = {{{sqrt(1.25)}}} = 1.118

To find how far she walked, just find the perimeter of the triangle 

P = a + b + c = 1 + .5 + 1.118 = 2.618 miles, roughly