Answer :

joyapease
ef is the square root of 13 

amathzing
Length is the same as distance, so use the distance formula to find EF.  

Distance = square root of (change in y)^2 + (change in x)^2.

The change in y is 3 and the change in x is 2.  

EF = square root of (3^2) + (2^2) = square root of 9 + 4 = square root of 13

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