Use the Distance Formula [tex] \sqrt{(x1- x2)^2 + (y1-y2)^2} [/tex]
Length of A to C
\sqrt{(7-0)^2 +(6-2)^2} =
\sqrt{49+16} =
\sqrt{65}
Length of D to B
\sqrt{(4-3)^2+ (8-0)^2} = \sqrt{1+ 64} = \sqrt{65}
Since both AC and DB are equal to \sqrt{65}, they are equal
