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britneyedebord20
You should get 12 cm by 6 cm. Since it’s asking for length (longest side), your answer is 12 cm.

Answer:

Each side is 9 cm long.

Step-by-step explanation:

The perimeter of a rhombus is given by

P = 4x, where P = perimeter, x = side length

36 = 4x

x = 9