Okay, considering that the two triangles are congruent, we obtain:
IJ=JF, so, replacing: IJ=25
JG=JH, so, replacing: JG=64
IG=FH, so, replacing: IG=127
m∠IGJ=m∠FHJ, so, replacing: m∠IGJ=15°
And m∠IJG=180°-41°-15°=124°
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