Aboy start at a and walks 3km east to b.
he then walks 4km north to c.
find the distance and bearing of cfrom a.

This distance model can be represented best by a right triangle. AB and BC are the legs, and AC is the hypotenuse. By plugging the known values into the pythagorean theorem, a^2 + b^2 = c^2, we can get our answer. 3^2 + 4^2 = c^2. 9 + 16 = c^2. c^2 = 25. Finally, our answer is 5km.

Hope this helps!