Vocab crossword puzzle

123456789
Across
  1. 5. a flat shape that has four sides and four angles
  2. 6. a series of three novels, movies, etc.
  3. 8. a fishing spear that has three points and that looks like a large fork
  4. 9. a shape that is like a star with five points formed by five straight lines
Down
  1. 1. a period of three months
  2. 2. a race with swimming running and biking
  3. 3. a flat shape that has five sides and five corners
  4. 4. a group of four singers or musicians who perform together
  5. 5. one of five babies that are born at the same time to the same mother
  6. 7. a US customary unit of measurement for liquids