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