K = 12 cm
AB=3x
BC=4x
AC=5x
AB=....?
3x+4x+5x=12
12x=12
x=1
AB=12 X 1
=12 cm (B)
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K = 12 cm
AB=3x
BC=4x
AC=5x
AB=....?
3x+4x+5x=12
12x=12
x=1
AB=12 X 1
=12 cm (B)