Respuesta :

Answer:

6.6 in (Brainliest please)

Step-by-step explanation:

A= 1/2 b*h

12.87= 1/2 b(3.9)

12.87= 1.95b

12.87/1.95= 1.95b/1.95

6.6=b

RELAXING NOICE
Relax