Im pretty bad at geometry and Im having a hard time following how to solve these types of problems. can anyone explain and show me? I'm more of a visual learner and having my teacher just tell me isn't too helpful.

Answer:
Step-by-step explanation:el problema 13 sale 69°
El problema 15 sale 130°
El problema 17 sale 96°
El problema 19 sale sale 8 cm