Question from jilayna, a student:

if i walk 5 miles north, 7 miles east, and 3 miles north again.to the nearest tenth of a mile ,how far,in a straight line, am i from my starting point

Jilayna,

Did you sketch a picture?

You started at S and ended at E.

What is the distance from S to C? What is the distance from C to E?

The angle SCE is a right angle.

What does Pythagoras tell you about the distance from E to S?

Penny