Answer:
51,51,78
Step-by-step explanation:
First of all equate the two angles since it is isoceles.
3x+9= 4x-5 , therefore x= 14
sub that in and find the rest of the angles.
angle G---> 4*14 -5 = 51
angle I--->3*14+9= 51
last angle 180 - 2*51 = 78
