circles and quadrilateral

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Across
  1. 3. angles on same segment of a circle are
  2. 5. a quadrilateral whose sides are equal and diagonals are perpendicular bisector
  3. 7. when the rectangle is divided into 2 triangles the diagonal is known as
  4. 9. area enclosed by two radii of a circle
  5. 11. Has a trunk
  6. 12. a quadrilateral whose one diagonal bisect other at 90
  7. 14. a quadrilateral which is formed by joining the angle bisectors of paralleloram
  8. 20. parallelogram is forms rectangle when all angles are_ angles
  9. 21. half of the longest chord
  10. 22. in a polygon when no line segments between the point goes inside
  11. 23. angle formed in any part of circumference is_ of the centre formed angle
  12. 25. area enclosed by an arc and a chord of a circle
Down
  1. 1. a quadrilateral which has only one parallel side
  2. 2. a quadrilateral whose all sides are equal and all angles are 90
  3. 4. two circles having same centre
  4. 6. two equal arcs of a circle form together a
  5. 8. when 4 points of quadrilateral lie on the circumference of circle
  6. 10. a quadrilateral whose opposite angles are equal by alt.interior angles prp
  7. 13. chords of a circle are equal then they are _from center
  8. 15. Likes to chase mice
  9. 16. when parallelogram is divided by its diagonal,2 triangles formed are
  10. 17. a trapezium whose non-parallel sides are equal
  11. 18. Man's best friend
  12. 19. Large marsupial
  13. 24. Flying mammal