Posted by Rose on Tuesday, April 9, 2013 at 7:49pm.
If the distance between location A to B is straight east 10 km. then from B to C is Nw 18KM How far would you be from point C to A.
Would you not need to more information then this to calculate this answer?

math  rbowh, Tuesday, April 9, 2013 at 7:54pm
Use the Pythagorean Theorem.
(AB)^2 + (AC) ^2 = (BC)^2
substitute for AB and BC.
then solve for AC

math  Reiny, Tuesday, April 9, 2013 at 7:58pm
no, just use the cosine law
AC^2 = 10^2 + 18^2  2(10)(18)cos45°  assuming that Nw meant "northwest"
= 169.44...
AC = √169.44.. = appr 13.02 km

math  rbowh, Tuesday, April 9, 2013 at 8:45pm
Rose,
Sorry, I got in a hurry.
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