Mah

123456789
Across
  1. 2. total of two numbers
  2. 4. solid shape with six faces
  3. 5. geometric figure with four sides
  4. 6. measurement system
  5. 7. operation undoing multiplication
  6. 8. shape with six sides
  7. 9. fraction's bottom number
Down
  1. 1. angle measuring ninety degrees
  2. 2. number sequence pattern
  3. 3. operation symbolized by x