Geometry Vocabulary

4. when two angles add up to 90 degrees
5. when two or more lines in the same plane never intersect each other. They have the same slope.
6. when two lines intersect at a 90 degree angle. Their slopes will be opposite reciprocals
9. when two angles add up to 180 degrees.
10. when the conditional and converse are true. Characterized with "if and only if". Symbols: p<-->q
11. same side of the transversal and in the same relative position. These angles are congruent.
12. hypothesis and conclusion are switched. Symbols: q --> p
14. a line that cuts through two lines at two distinct points. Often with parallel lines.
16. when the conditional statement is false, this shows what makes it false.
17. hypothesis and conclusion are switched and both are negated. Symbols: not q --> not p
19. also called same-side interior. Same side of transversal and INSIDE the parallel lines. These angles are supplementary.
20. an if-then statement with a hypothesis and a conclusion. Symbols: p --> q

1. angles that have an equal measure
2. the "if" part of a statement. It's symbolized by the letter p
3. the "then" part of a statement. It's symbolized by the letter q
7. exterior different sides of the transversal and OUTSIDE the parallel lines. These angles are congruent.
8. interior different sides of the transversal and INSIDE the parallel lines. These angles are congruent.
13. hypothesis and conclusion are both negated. Symbols: not p --> not q
15. two angles that are next to each other. They share a common vertex.
18. opposite angles formed by two intersecting lines. Form an X shape. These angles are congruent.