- Problem Number 1: Two adjacent angles
Firstly, adjacent angles are two angles that lie in the same plane and have a common vertex and a common side, but no common interior points. Therefore, the answer is
∠LTN and ∠NTE.
- Problem Number 5: Identify two obtuse vertical angles
Firstly, an obtuse angle is an angle greater than 90 and less than 180. Secondly, vertical angles are two nonadjacent angles formed by two interesting lines. Therefore, the answer is ∠RNT and ∠SNU.
Source: Classroom notes
Austin Hardy Geometry Blog 