19 terms

conditionals

if-then statements

hypothesis

follows the "if" in conditionals, an educated guess

conclusion

follows the "then" in conditionals

converse

formed by interchanging the hypothesis and the conclusion, aren't always true

counterexample

an example that implies that the converse is false

inverse

when not is added in a conditional and is true

contrapositive

when not is added to a converse and is true,

contrapositive, converse

the conditional = the ________________ and the inverse = the ___________

biconditional

a statement that contains the words "if and only if"

substitution

the property that substitutes

reflexive

the property that reflects what is true

symmetric

the property that switches the things on opp. sides of the =

transitive

property that says if blank = blank and blank = blank, then blank 1 = blank 2

complementary angles

angles that add up to 90 degrees

supplementary angles

angles that add up to 180 degrees

vertical angles

non adjacent angles from when 2 lines intersect

perpendicular lines

lines that intersect to form right angles or 90 degree angles

statement, converse

in order for a definition to be true, the ____________ & ___________ is true

deductive reasoning

proofs - proved statements