Across
- 2. ___________angles sit in the same relative position when comparing parallel lines and a transversal.
- 4. When two lines cross, the angles opposite each other that are congruent are called ________angles.
- 5. Corresponding angles have measures that are __________.
- 6. A __________statement is know as an "if-then" statement.
- 7. A line that passes through two lines in the same plane at two distinct points.
- 9. __________interior angles sit between parallel lines on the same side of the transversal and are supplementary.
- 15. The altitude of a triangle is a perpendicular segment from a vertex to the line containing the base.
- 17. The statement of the meaning of a word or symbol that is accepted by the mathematical community.
- 19. A simple and useful statement in geometry that is accepted by the mathematical community as true without proof.
- 20. An angle ________divides an angle into two congruent angles.
Down
- 1. A linear pair is two _________angles that share a vertex and a side.
- 3. When a figure can be folded or divided in half so that the two halves match exactly, it is said to be _________.
- 5. A ________statement switches the "if" and "then" parts of a conditional statement.
- 8. Being the same distance from each other or in relation to other things.
- 10. The measure of an exterior angel in any triangle is ______to the sum of the two remote interior angles.
- 11. An exterior angle of a triangle is an angle formed by one side of the triangle and the __________of an adjacent side of the triangle.
- 12. __________angles share a common vertex and a common side.
- 13. Alternate __________angles lie outside of two lines on opposite sides of a transversal.
- 14. A statement that can be demonstrated to be true by using definitions, postulates, properties, and previously proven theorems.
- 16. A line segment in a triangle that extends from any vertex to the midpoint of the opposite side.
- 18. Alternate __________angles lie between two lines and are on opposite sides of a transversal.