April surfed for 1/3 of the 6 hours she was at the beach. she spent the rest of the time building a sand castle. how many hours did she spend building the castle.

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.