Points, lines and planes are
What is an undefined term
To create the converse of a conditional statement, we must
What is flip/switch the hypothesis and the conclusion
State the converse of "If an angle is 95 degrees, then it is obtuse."
What is "If an angle is obtuse, then it is 95 degrees"
To create the inverse of a conditional statement, we must
What is negate the hypothesis and the conclusion (add not)
State the inverse of "If a polygon has 5 sides, then it is a pentagon"
What is "If a polygon does not have 5 sides, then it is not a pentagon."
Two or more points that lie on a line
What is collinear
To create the contrapositive of a conditional statement, we must
What is flip/switch and negate (add not) to the hypothesis and conclusion
State the contrapositive of "If two lines are perpendicular, then they create right angles."
What is "If two lines do not create right angles, then they are not perpendicular."
Two lines that are noncoplanar and do not intersect
What is skew
An example that proves our statement is false
What is counterexample
The equivalent statement to a conditional statement
What is contrapositive
Statements that are assumed to be true
What is a postulate
True or False: If a polygon is a rectangle, then it is a square.
What is false. A rectangle that has 2 sides longer than the others is still a rectangle, but not a square.
The equivalent statement to an inverse
What is converse
Statements that must be proven