Question

i need help figuring out a geometry proof Given: angle ABC is congruent to angle DEF and angle GHI is congruent to DEF Prove: measurement of angle ABC is equal to measurement of angle GHI

Answer 1

∠ABC ≅ ∠DEF, given

∠GHI ≅ ∠DEF, given

m∠ABC = m∠DEF, definition of ≅ angles

m∠GHI = m∠DEF, definition of ≅ angles

m∠DEF = m∠GHI, symmetric property

m∠ABC = m∠GHI, transitive property