Geometry

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Across
  1. 3. a straight line extending from the center of a circle or sphere to the circumference or surface
  2. 4. a polygon with four sides
  3. 6. a rectangle having all four sides of equal length
  4. 7. a 90 degree angle
  5. 9. a quadrilateral plane figure having two parallel and two nonparallel sides
  6. 10. a triangle with all sides equal and all angles equal
  7. 11. the intersection point of two sides of a plane figure
  8. 12. an angle greater than 90 degrees but less than 180 degrees
  9. 14. an angle less than 90 degrees but greater than 0 degrees
Down
  1. 1. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
  2. 2. a continuous extent of length
  3. 5. a polygon with 5 sides and 5 angles
  4. 6. a geometric figure such as a square, triangle, or rectangle.
  5. 8. line segments that do not intersect
  6. 13. the part of a straight line considered as originating at a point on the line and as extending in one direction from that point