Challenger

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Across
  1. 2. an angle in between 90 and 180 degrees
  2. 4. a 90 degree angle
  3. 6. the perimeter of a circle
Down
  1. 1. to put shapes together that fit perfectly into each other
  2. 3. a quadrilateral with only 2 parallel sides
  3. 4. circumference divided by diameter
  4. 5. an angle ending in a sharp point
  5. 7. center point of circle to perimeter in shortest distance