Answered

A man walks 1 km east then 1 km northwest. How far is he from starting point?

Sagot :

Pingwin09viz
A 1 km east goes at the right which makes the direction positive, and then a 1 km northwest has the angle of 90 + 45 = 135 degrees starting at the 1st quadrant.
Therefore,
1 km + 1 km (cos 135) = 0.293 km