Answer:
13. 68
14. 22
15. 63
16. 27
17. 22
Step-by-step explanation:
You can approach this in many different ways. Just keep in mind that all angles in a triangle add up to 180, angles that make up a square angle add up to 90, and that an angle plus another angle ending up making a straight line equal 180 (such as the one near 131 and the unwritten angle near it).
