Given 3 ∠F≅∠I Given 4 m∠GEI=m∠GEH+m∠HEI Additive Property of Angle Measure 5 m∠FEH=m∠FEG+m∠GEH Additive Property of Angle Measure 6 m∠GEI=m∠GEH+m∠FEG Substitution 7 m∠FEH=m∠GEI Transitive Property of Equality