More with Proofs

Proofs may be as easy as 1, 2, 3 ... maybe. Pupils participate in creating four example proofs. The presentation uses a list of geometric properties to develop the proofs by filling in both the statements and reasons. Scholars practice writing their own proofs, concentrating mainly on algebraic proofs.

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CCSS: Adaptable
Instructional Ideas
  • Make a point that not all correct proofs look the same way
Classroom Considerations
  • Third section in a four-part unit on geometric proofs
  • Assumes knowledge of angle relationships such as supplementary and those associated with parallel lines
  • Shows a second way to write a particular proof
  • Includes additional practice if needed
  • None