There was a surplus of office space in a city, with 400,000 square feet, or 16% of the total office space, vacant. how much office space did the city have?

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno nina made two errors in the proof. identify and correct the errors.