Geometry Crossword Puzzle

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Across
  1. 2. A shape is this if it has congruent sides and congruent angles
  2. 4. A segment connecting two points of a circle that passes through the center
  3. 5. A polygon with ten sides
  4. 7. A segment that connects two midpoints of a triangle
  5. 9. Two angles are this if the sum of their angle measures equal 90 degrees
  6. 12. A shape is this if it has all congruent angles
  7. 14. A triangle is this if it has no congruent sides
  8. 15. One of the three basic trigonometric ratios whose equation is opposite over hypotenuse
  9. 16. A straight segment connecting two points on a circle
  10. 17. Two lines that will never intersect each other
  11. 18. A parallelogram whose four sides are all congruent
Down
  1. 1. A straight line that touches the edge of a circle at one point
  2. 3. The sum of the lengths of a shape's sides
  3. 6. The distance around a circle
  4. 8. Two angles are this if the sum of their angle measures equal 180 degrees
  5. 9. Two lines that share all the same points
  6. 10. A shape is this if it has all congruent sides
  7. 11. A quadrilateral that has one pair of opposite, parallel sides
  8. 13. Shapes with congruent angles but not necessarily congruent sides
  9. 14. A straight line that intersects a circle at two points