Solid Mensuration

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Across
  1. 1. number of sides: 6
  2. 5. the center of the largest circle that can be inscribed in a triangle
  3. 7. an expression of equality between two ratios
  4. 8. interior angle of this polygon is less than 180 degrees
  5. 9. number of sides: 5
  6. 10. has at least one interior angle that measures more than 180
  7. 12. a triangle with no congruent sides and no congruent angles
  8. 14. a quadrilateral in which the opposite sides are parallel
  9. 19. a triangle with two congruent sides and two congruent angles
  10. 20. a quadrilateral with no parallel sides
  11. 22. a parallelogram in which the interior angles are all right angles
  12. 23. a line segment joining two non-adjacent vertices of the polygon
  13. 24. a parallelogram in which all sides are equal
Down
  1. 2. a polygon which its angles are congruent
  2. 3. number of sides: 10
  3. 4. the center of the mass of the triangle
  4. 6. number of sides: 9
  5. 10. the center of the circle circumscribing a triangle
  6. 11. number of sides: 7
  7. 12. a special type of a rectangle in which all the sides are equal
  8. 13. the amount of two dimensional space that a plane figure occupies
  9. 15. a polygon which its sides are equal
  10. 16. not always in the interior of the triangle
  11. 17. number of sides: 8
  12. 18. the altitude of the isosceles triangles that can be formed from a regular polygon
  13. 21. a closed plane figure formed by line segments