Sally rides her bike home from school. She leaves the school and rides 3 miles north and then turns west and rides 4 miles to get home. How far is her school from her house?

We can solve this with geometry. Assuming when she turns left it's a 90 degree turn, then her route creates a 3,4,5 triangle. So the most direct route from the school to her home would be the hypotenuse of 5 miles. The answer is 5 miles.