Language Of Geometry

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Across
  1. 3. 2D doubly ruled surface
  2. 4. an angle whose sides lie in opposite directions
  3. 7. lines that intersect at a 90 degree angle
  4. 10. idealization of objects which are often described in terms of two points
  5. 11. a measurement of a plane angle in which one full rotation is 360 degrees
  6. 13. middle part of a line segment
  7. 14. the angle bounded by two lines perpendicular to eachother
  8. 15. each angular point of a polygon
Down
  1. 1. instrument for mesuring angles
  2. 2. lines in a place that are always the same distance apart
  3. 3. a precise location or place in a plane
  4. 5. two lines that share one point
  5. 6. the figure two rays make when they meet
  6. 8. device used to measure distances of straight lines
  7. 9. a part cut off from a figure
  8. 12. a vector from point to point