geometry

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Across
  1. 4. a closed plane curve consisting of all points at a given distance from a point within it called the center
  2. 5. a triangle with one internal angle equal to 90 degrees
  3. 9. a polygon with 5 sides and 5 angles
  4. 11. a triangle which has two sides equal
  5. 12. my last name starts with c
Down
  1. 1. a rectangle having all four sides of equal length
  2. 2. an angle less than 90 degrees but greater than 0 degrees
  3. 3. the intersection point of two sides of a plane figure
  4. 6. my first name starts with c
  5. 7. a polygon with 5 sides and 5 angles
  6. 8. a position in space
  7. 9. a quadrilateral having both pairs of opposite sides parallel to each other
  8. 10. a polygon having six sides and six angles