Geometry-Ch 2 Vocab

Front

Hypothesis

Back

Part of a conditional statement after the 'if'.

Front

What is a two column proof?

Back

A proof with statements and reasons in two columns.

Front

What do you call two lines that intersect to form a right angle?

Back

Perpendicular lines.

Front

What is a specific case for which a conjecture is false called?

Back

Counterexample.

Front

What is a truth table used for?

Back

To show the truth values of logical expressions.

Front

What is a conditional statement?

Back

A statement that can be written in 'if..., then...' form.

Front

What are parallel lines?

Back

Lines in a plane that never meet and are always the same distance apart.

Front

What is a conjecture?

Back

A statement that is believed to be true but has not yet been proven.

Front

What is the converse of a conditional statement?

Back

The statement formed by reversing the hypothesis and conclusion.

Front

What is a theorem?

Back

A statement that has been proven based on previously established statements.