Posted by Leticia on Wednesday, February 13, 2013 at 12:33pm.
John walks 20km due east then turns 270 degrees anticlockwise and walks another 20km. What would be his bearing from the starting point?

Math  Lena, Wednesday, February 13, 2013 at 12:40pm
I think it would be best to draw a diagram for this sort of question. So John walks 20 km East.
START > JOHN (@ 20km EAST)
 So John is facing this direction >
 If you were to turn 270 degree facing > then you would be facing downwards or South
 So, John walks another 20 km South
If you draw this out, you'll see that you have a triangle with both the base and height being 20 km and the hypotenuse is the unknown.
From there you would use Pythagorean theorem (a^2 + b^2 = c^2) and solve for 'c' or the hypotenuse. That should be John's distance from the start.
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