Geometry Crossword Puzzle by Michael Brenckle

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Across
  1. 2. A boundless three-dimensional set of all points
  2. 6. A statement or conjecture that can be proven true by undefined terms, definitions, and postulates.
  3. 8. The point of concurrency of the medians of a triangle
  4. 11. A line that intersects 2 or more lines in a plane at different points
  5. 12. A unit of measure used in measuring angles and arcs
  6. 13. In a triangle, a segment from a vertex of the triangle to the line containing the opposite side and perpendicular to that side.
  7. 14. A triangle with all angles congruent
  8. 17. Two polygons are _______ if and only if their corresponding angles are congruent and the measures of their corresponding sides are proportional.
  9. 20. An angle ________ is a ray that divides an angle into 2 congruent angles
Down
  1. 1. A line ________ is a measurable part of a line that consists of two points, called endpoints, and all of the points between them
  2. 3. In a triangle a line segment with endpoints that are a vertex of a triangle and the midpoint of the side opposite the vertex
  3. 4. The sum of the lengths of the side of a polygon
  4. 5. A triangle with no two sides congruent
  5. 7. The ___ of any measurement depends on the smallest unit available on the measuring tool
  6. 9. A triangle with all sides congruent
  7. 10. A point is in the __________ of an angle if it does not lie on the angle itself and it lies on a segment with endpoints that are on the sides of the angle
  8. 15. A triangle with at least two sides congruent
  9. 16. The point halfway between the endpoints of a segment
  10. 18. A comparison of two quantities
  11. 19. A logical argument in which each statement you make is supported by a statement that is accepted as true