Prove using 2-column proof and use the auxiliary set to aid your proving

Question

Given: OL = OV & EL = EV

Prove: Angle L is congruent to angle V

Answer 1

Triangles LOV and LEV are isosceles.

Angles OLV and OVL are congruent base angles , as are ELV and EVL

Angle L = Angle OLV + angle ELV

= angle OVL + angle EVL

= angle V