At noon a runner starts 3 miles north of his house. At 1:00 pm he is at a point that is 1 mile west and 1 mile south of his house.

Question

How far has he run in his first hour?

Answer 1

MAKE A DRAWING  and label various known distances for this situation!!  you can solve it using geometry, probably including the Pythagorean theorem.  You have to learn to TRY!