Geometry Crossword Puzzle

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Across
  1. 3. an exact location in space that has zero dimension
  2. 5. angle an angle measuring exactly 90 degrees
  3. 8. lines intersecting lines that meet to form exactly four right (90 degrees) angles
  4. 11. segment a portion of a line that is bounded by two distinct endpoints
  5. 12. a portion of a line that has a fixed starting point and extends infinitely in only one direction.
  6. 14. a perfectly flat, two-dimensional surface that extends infinitely in all directions
  7. 15. a three-sided polygon (e.g., equilateral has 3 equal sides; isosceles has 2 equal sides).
Down
  1. 1. angle an angle measuring greater than 90 degrees and less than 180 degrees
  2. 2. a straight line segment that passes directly through the center of a circle and touches both sides (equal to 2x radius)
  3. 4. lines lines that cross or pass through the same point
  4. 5. a line segment from the center of a circle to any point on its outer edge
  5. 6. lines coplanar lines that never intersect and remain a constant distance apart
  6. 7. a four-sided polygon (e.g., rectangle, square, rhombus, trapezoid).
  7. 9. a closed two-dimensional figure made up of three or more straight line segments
  8. 10. a perfectly straight, one-dimensional path that extends infinitely in both directions
  9. 13. angle an angle measuring greater than 0 degrees and less than 90 degrees