Respuesta :

calculista

Answer:

10.8 cm

Step-by-step explanation:

we know that

The perimeter of the triangular face is equal to the sum of its sides

P=a+b+c

we have

a=28 mm=28/10=2.8 cm

b=4 cm

c=4 cm

substitute the values

P=2.8+4+4=10.8 cm

Answer:

10.8 cm

Step-by-step explanation: