Geometry

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Across
  1. 2. lines that do not intersect and are not coplanar *2 words*
  2. 8. coplanar circles that have the same center *2 words*
  3. 9. planes that do not intersect *2 words*
  4. 12. angles that lie between 2 lines *2 words*
  5. 14. (blank) is the distance around a circle
  6. 17. non-adjacent exterior angles that lie on opposite sides of the transversal *3 words*
  7. 19. a line that touches a circle in one spot
  8. 20. the (blank) of a trapezoid is the segment that connects the midpoints of the legs
  9. 21. (blank) is the shortest arc connecting two endpoints on a circle *2 words*
Down
  1. 1. (blank) is an arc with endpoints that lie on the diameter
  2. 3. a segment with endpoints on the circle that passes through the center and is made up of 2 radii
  3. 4. a segment with endpoints at the center and on the circle
  4. 5. the locus or set of all points in a plane equidistant from a given point called the center
  5. 6. a line that intersects the circle in two spots
  6. 7. if the object is below the level of the observer, then the angle between the horizontal and the observer's line of sight is called the (blank) *3 words*
  7. 10. a quadrilateral with exactly two pairs of consecutive congruent sides
  8. 11. interior angles that lie on the same side of a transversal *3 words*
  9. 13. an angle whose vertex is on the center *2 words*
  10. 15. a segment with endpoints on the circle
  11. 16. both pairs of opposite sides are parallel
  12. 18. quadrilateral with exactly one pair of parallel sides