Angles in a quadrilateral

1. 1.
   What is each interior angle of a regular octagon, in degrees?
2. 2.
   What is each exterior angle of a regular octagon, in degrees?
3. 3.
   Three angles of a quadrilateral are 110°, 78° and 71°. What is the fourth angle, in degrees?
4. 4.
   What is the sum of the interior angles of a decagon, in degrees?
5. 5.
   What is each exterior angle of a regular triangle, in degrees?
6. 6.
   What is each interior angle of a regular hexagon, in degrees?
7. 7.
   What is each exterior angle of a regular quadrilateral, in degrees?
8. 8.
   What is each interior angle of a regular pentagon, in degrees?
9. 9.
   What is the sum of the interior angles of a quadrilateral, in degrees?
10. 10.
    What is the sum of the interior angles of a hexagon, in degrees?
11. 11.
    What is each exterior angle of a regular hexagon, in degrees?
12. 12.
    What is each interior angle of a regular triangle, in degrees?
13. 13.
    What is the sum of the interior angles of a pentagon, in degrees?
14. 14.
    What is each interior angle of a regular nonagon, in degrees?
15. 15.
    What is each exterior angle of a regular decagon, in degrees?
16. 16.
    What is the sum of the interior angles of a nonagon, in degrees?
17. 17.
    What is each interior angle of a regular decagon, in degrees?
18. 18.
    Three angles of a quadrilateral are 122°, 73° and 41°. What is the fourth angle, in degrees?
19. 19.
    Three angles of a quadrilateral are 65°, 102° and 81°. What is the fourth angle, in degrees?
20. 20.
    What is each exterior angle of a regular pentagon, in degrees?

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