Question 110456
what you have is a right triangle with sides (4+2)=6 in the y direction 
& (1+3)=4 in the x direction.
seeing as we're looking for the hypotenuse of this right triangle we use the pythagorean therom:a^2+b^2=c^2
6^2+4^2=c^2
36+16=c^2
c^2=52
c=sqrt52
c=7.21 is the distance between these 2 points.
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OR C=SQRT52=SQRT(4*13)=2SQRT(13)
THIS IS THE SAME ANSWER IN A DIFFERENT FORM.
YOU NEED TO BE ABLE TO CONVERT THESE TYPE OF ANSWERS AS YOU DIDN'T GIVE THE AVAILABLE ANSWERS.