Mathematics words

12345678
Across
  1. 3. adds up to 180
  2. 7. Number which occurs the most
  3. 8. A decimal which ends
Down
  1. 1. a number with vinculum
  2. 2. A decimal which never ends
  3. 4. I am the same forwards or backwards
  4. 5. I am an "odd" Prime Number
  5. 6. angle Angle bigger than 180 but smaller than 360