Unit 3 - Geometric Figures - Vocabulary

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