Ethan's Awesome Crossword yayayaya

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Across
  1. 1. Opposite of acute
  2. 3. Sixteenth letter of the Greek alphabet
  3. 6. A four sided shape with only two parallel sides
  4. 7. A parallelogram with equal sides
Down
  1. 2. A shape with all sides the same length
  2. 4. Four sided shape, opposite sides parallel
  3. 5. A straight line in the center of a circle