Answers:
17) 35 degrees
18) 55 degrees
19) Exterior angle: 99 degrees & Third angle: 81 degrees
20) 89 degrees
21) 47.5 degrees
Hope this helps! Have a great day!
Answer to 17) - 35 degrees
Answer to 18) - 55 degrees
Answer to 19) - The exterior angle is 99 degrees and the third angle is 81 degrees
Answer to 20) - 89 degrees
Answer to 21) - 47.5 degrees
Have a nice day! ^_^
~abelxoconda
