Answer:
m∠FGJ=37.5°
Explanation:
we know that
m∠FGH=75°
m∠FGH=m∠FGJ+m∠JGH
so
75°=m∠FGJ+m∠JGH ------> equation A
If the ray GJ is the angle bisector of angle FGH
then
m∠FGJ=m∠JGH ----> equation B
substitute equation B in equation A and solve for m∠FGJ
75°=2(m∠FGJ)
Divide by 2 both sides
m∠FGJ=37.5°