Number play

12345678
Across
  1. 3. fivesidenumber
  2. 5. hastwoendpoints
  3. 7. sixsidenumber
  4. 8. smallestevenprimenumber
Down
  1. 1. threesidenumber
  2. 2. foursides
  3. 4. smallestoddnumber
  4. 6. biggesttwodigitnumber