Respuesta :
Answer:
 a = 17, b = 6
Step-by-step explanation:
Sides GF and GH are congruent, so we have ...
 GF = GH
 30 = 2a -4 . . . . substitute given values
 15 = a -2 . . . . . divide by 2
 17 = a . . . . . . . . add 2
Sides FJ and HJ are congruent, so we have ...
 FJ = HJ
 3b +6 = 24 . . . . substitute given values
 b +2 = 8 . . . . . . divide by 3
 b = 6 . . . . . . . . . subtract 2
The values of a and b are (a, b) = (17, 6).