Introduction to Proofs
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Lesson Summary:
This video introduces the concept of two column proofs in geometry. The first column is the statements column, where logical steps from the givens to the proof statement are listed, while the reasons column should only contain given theorems, postulates, and definitions. It's important to show all words in the statement column and use the actual wording of the theorem or definition in the reasons column to recognize if it has been used in the statements. Using theorem or postulate numbers is not recommended as they may change from book to book.
Lesson Description:
Winner of the 2-minute video contest and a TI-84+ graphing calculator!
Video introduces two column proofs
Questions answered by this video:
- How do you write a 2-column proof in Geometry?
- What should you write in the statement and reasons columns in a proof?
- How do you prove something in Geometry?
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Staff Review
This video reviews the steps to follow in order to write a 2-column proof in Geometry. It is a good introduction to proofs and the underlying concepts, but no actual examples are done.
