Geometry Vocabulary: Crossword Puzzle A

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Across
  1. 3. A quadrilateral in which the opposite sides are parallel and congruent and no right angle.
  2. 5. A line segment that connects the center of a circle to its circumference.
  3. 7. A line segment that joins two points on the circumference of the circle.
  4. 10. A polygon with 3 sides and 3 interior angles.
  5. 11. A quadrilateral with only one pair of parallel sides.
  6. 14. Lines that cross or meet each other at a single point.
  7. 16. An alignment of sets of points on a straight path that extends infinitely, goes on forever, in opposite directions.
  8. 17. A common point where two rays meet
  9. 19. A polygon with four sides, four interior angles and four vertices.
Down
  1. 1. A flat surface extending infinitely in all directions, with no thickness or curvature.
  2. 2. Two intersecting lines that form four right angle at their point of intersection.
  3. 3. Lines on the same plane that are always the same distance apart and never intersect
  4. 4. A quadrilateral with four congruent sides and two pairs of opposite sides are parallel.
  5. 6. A quadrilateral with four equal sides, four right angles and two pairs of opposite sides are parallel.
  6. 8. A straight line segment that passes through the center of the circle and whose endpoints lie on the circumference of the circle.
  7. 9. An exact location in space. Looks like a dot.
  8. 12. triangle A triangle in which one angle is 90°
  9. 13. A part of a straight line that has two distinct endpoints.
  10. 15. A quadrilateral in which all right angles and the opposite sides are equal and parallel.
  11. 18. A part of a line with one endpoint that extends infinitely in one direction.