Answer: sqrt(89)
Explanation:
let x1=4 & y1=2
and x2=9 &y2=10
d= sqrt (x2-x1)^2+(y2-y1)^2
=sqrt (9-4)^2+(10-2)^2
=sqrt (5)^2+(8)^2
=sqrt (25+64)
=sqrt(89)
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