Geometry Crossword puzzle

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Across
  1. 2. / Having the same shape but not the same size.
  2. 3. triangle / Triangle with one obtuse angle.
  3. 5. / Lines that are the same distance apart.
  4. 10. / Section of a curve or part of a circle.
  5. 11. / Having the same shape and size.
  6. 14. / An exact location in space.
  7. 15. / The boundary of a closed geometric figure.
  8. 17. triangle / A triangle which has two equal sides.
  9. 19. / The line segment between two points on a given curve.
  10. 20. / A straight line extending from the center of a circle.
Down
  1. 1. / A straight line passing through the center of a circle.
  2. 4. / Lines that intersect at right angles to each other.
  3. 6. / Surface measurement.
  4. 7. triangle / A triangle having three unequal sides and angles.
  5. 8. angle / Angle measuring less than 90 degrees.
  6. 9. / The intersection point of two sides on a plane figure.
  7. 12. segment / A part of a line having two endpoints.
  8. 13. line / Angle measuring 180 degrees.
  9. 16. / A part of a line having only one endpoint.
  10. 18. angle / Angle measuring 90 degrees.