Respuesta :

9514 1404 393

Answer:

  3 units

Step-by-step explanation:

B'C' = 9 units = 3 × BC

BC = (9 units)/3 = 3 units

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The scale factor multiplies all lengths of the preimage to give you the lengths of the image. You can count the grid squares to find the length of B'C' = 9.

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