a triangle has sides 9 cm , 12 cm and 18 cm the longest side of a similar triangle measures 12 cm . what are the length of the other sides ??

the lengths of the sides of the first triangle are in the ratio= 9:12:18= 3:4:6

as the triangles are similar the ratio of the sides will be the same i.e., 3:4:6

let the lengths of the sides be 3x,4x,6x.

6x=12 , x=12/6 = 2

so, the sides are 3 X 2= 6cm, 4 X 2 =8cm

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