UNIT 8 VOCABULARY WORKSHEET - I.M.1

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Across
  1. 4. A proof in which the statement to be proved is assumed to be false and a contradiction is shown.
  2. 8. The nonadjacent angles formed by two intersecting lines.
  3. 11. The point of concurrency of the three medians of a triangle.
  4. 13. The common side of two consecutive angles of a polygon.
  5. 14. Any side of a triangle.
  6. 15. The same distance from two or more objects.
  7. 16. A line drawn in a figure to aid in a proof.
Down
  1. 1. A line that intersects two coplanar lines at two different points.
  2. 2. A triangle with at least two congruent sides.
  3. 3. The point of concurrency of the three angle bisectors of a triangle.
  4. 5. A point where three or more lines coincide.
  5. 6. The side opposite the right angle in a right triangle.
  6. 7. An angle formed by two sides of a polygon with a common vertex.
  7. 9. A perpendicular segment from a vertex to the line containing the opposite side.
  8. 10. Having the same size and shape.
  9. 12. An argument that uses logic to show that a conclusion is true.