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Vectors: Magnitude
For points A(6, –1) and B(9, 3)
the magnitude of the vector
->
AB
 is to 3 dps.

tickcross


Worked Solution:

The direction vector is
->
AB
 = (change in x from A to B) i + (change in y from A to B) j
= 3 i + 4 j
The magnitude (length) of this vector is √( 32 + 42 ) = √25 = 5

© MEI Produced by Dr Ron Knott, revised 15 May 2007
tom . button [AT] mei . org . uk 		Test reference: VectorsMag.html?ref=43371,qu=2pts