geometry
posted by Anonymous .
sandra walked 9 blocks due east then 12 blocks due south . what is the shortest distance from where she started to where she finished

Use the Pythagorean theorem and find the diagonal of this rectangle.
a^2 + b^2 = c^2
9^2 + 12^2 = c^2
81 + 144 = c^2
225 = c^2
15 = c