Unit 5 Geometry crossword puzzle

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Across
  1. 2. the sum of the measures of the angles
  2. 4. where one-half of the object reflects the other half of the object
  3. 5. every polygon has an exterior angle sum of 360
  4. 6. two congruent sides of an isosceles triangle.
  5. 8. when an object appears the same after being rotated by 360/n degrees
  6. 10. something that has two sides.
  7. 12. a triangle with two congruent sides and two congruent angles.
  8. 13. where all angles are equal in length
  9. 14. an angle formed between the two congruet sides.
  10. 16. where all sides are equal in length
  11. 17. an imaginary line that divides a shape into two identical halves
  12. 18. an angle that lies outside a polygon
  13. 20. a polygon having n sides and n vertices
Down
  1. 1. use (n-2) *180/n to calculate the interior angle of a regular polygon
  2. 3. has all equal sides and all equal angles
  3. 7. to calculate the angle of a regular polygon i need to use 360/n
  4. 9. the point that is equidistant from each vertex of a regular polygon
  5. 11. a side that is different in length from the other two sides.
  6. 15. a figure looks exactly the same after rotating it some angle less than 360
  7. 19. to calculate the sum of interior angles of any polygon, use 180*(n-2)