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Across
  1. 3. A polygon having four equal sides and four equal angles.
  2. 4. is a solid figure bounded by six faces
  3. 8. are defined as triangles with three unequal sides and three unequal angles.
  4. 12. A plane curve everywhere equidistant from a given fixed point, the center.
  5. 14. is a triangle in which one angle is a right angle (that is, a 90- degree angle).
  6. 15. A quadrilateral with all four sides equal in length.
Down
  1. 1. is the set of points that are all at the same distance r from a given point, but in three-dimensional space.
  2. 2. is a triangle in which all three sides are equal.
  3. 5. is a three-dimensional geometric shape that tapers smoothly from a flat base
  4. 6. is a three dimensional shape with two round shapes at either end and two parallel lines connecting the round ends.
  5. 7. is a figurate number that represents a pyramid with a base and four sides.
  6. 9. A quadrilateral having no parallel sides
  7. 10. A parallelogram having four right angles
  8. 11. A four-sided plane figure with opposite sides parallel.
  9. 13. is a solid that has two faces that are parallel and congruent.