Which lengths represent the lengths of the sides of a scalene triangle: 3, 4, 5; 4, 4, 5; 12, 7, 7; 15, 15, 15?

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##3,4,5" "## A scalene triangle by restriction has three illmatched sides.

##4,4,5 and 12,7, 7## are isosceles triangles accordingly they accept two correspondent sides .

##15,15,15 " "##is an equilateral triangle -it has three correspondent sides.

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