Vocabulary

3. The part of a conditional statement after then
5. a mathematical statement that has not yet been rigorously proved
6. an angle of exactly 90 degrees
8. two angles whose sum is 90 degrees
10. a location represented by a dot
11. The part of a conditional statement after if
16. a two-dimensional space or flat surface that extends indefinitely
18. Two statements are equivalent if they always have the same logical value
19. coming to a conclusion after specific observations

1. a combination of a conditional statement and its converse written in the if and only if form
2. A part of a line-it has two endpoints
4. angles that sum up to 180 degrees
7. a way to assert that we know a mathematical concept is true
9. a statement that can be proved to be true based on known and proved facts
12. an angle that is more than zero degrees, but less than 90 degrees
13. A statement joining two events together based on a condition in the form of “If something, then something”
14. an angle larger than 90° but less than 180°
15. a combination of two rays (half-lines) with a common endpoint.
17. a straight one-dimensional figure that does not have a thickness, and it extends endlessly in both directions