Could I have help will all these questions

Could I have help will all these questions class=

Verified Answer :

I hope this helps you


1)


a=360/30


a=12


2) parallelogram


3)

3x+10+x+148+117+90=450


4x=85


x=21.25



4)


a=360/30


a=12


180-12=168 exterior angle