1. Lesson 4

Mathematics 20-2 M2 Lesson 4

Module 2: Logic and Geometry

 

Lesson 4: Identifying Errors in Proofs

 
Focus
 

This is a picture of police tape securing a crime scene.

iStockphoto/Thinkstock

 

Many types of puzzles or problems involve the use of reasoning to solve a mystery. TV shows like CSI or NCIS often have the lead detectives make a conjecture about the identity of the murderer and then justify their reasoning through investigation.

 

Not all reasoning used to justify a proof is valid. For instance, circumstantial evidence often points at one suspect and, often times, once the forensic analysis is done, a different suspect is identified.

 

This lesson will help you answer the following inquiry question:

  • How can the validity of a proof be justified?
Assessment

All assessment items you encounter need to be placed in your course folder.

 

course folder

Save a copy of the Lesson 4 Assignment to your course folder. You will receive more information about how to complete the assignment later in this lesson.