Respuesta :

sqdancefan

Answer:

  16 cm², 49 cm²

Step-by-step explanation:

The area ratio is the square of the perimeter ratio, so is ...

  4² : 7² = 16 : 49

As it happens the sum of these "ratio units" is 16 +49 = 65, so each must represent 1 cm².

The areas of the triangles are 16 cm² and 49 cm².