Uni, Bi, Tri, Quad Practice

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Across
  1. 3. a pair of eyeglasses with two parts
  2. 5. some clothing worn by members of the same organization or team
  3. 6. a vehicle with three wheels
  4. 7. a cycle with one wheel
  5. 8. an athletic contest consisting of three events
  6. 9. large muscles in the front of the thigh split into four portions
Down
  1. 1. a figure with three sides and three angles
  2. 2. a geometric figure with four sides
  3. 4. a vehicle with two wheels propelled by pedals and a chain and has handlebars
  4. 7. a mythical animal represented by a horse with one horn