Morphology-uni, bi, tri, quad

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Across
  1. 4. four singers or 4 musicians
  2. 6. has two wheels
  3. 7. some kids wear these to school
  4. 9. a stand with three legs
  5. 10. a four sided figure, having four straight sides
Down
  1. 1. a group of three novels, plays, or movies
  2. 2. ability to speak two languages
  3. 3. one fourth of something
  4. 5. a pair of glasses having lenses with two parts
  5. 8. a three sided figure