What do Sherlock Holmes and geometry have in common? Why, it is a matter of deductive reasoning as the class learns how to justify each step of a problem. Pupils then present a known fact to ensure that their decision is correct.

Concepts

deductive reasoning, angles, addition property of equality, reflexive property

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Additional Tags

math

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Instructional Ideas

• Divide the class into groups and assign each group a property discussed in the lesson; have them create a model to depict how this property is applied in a real-life situation
• Create a sorting game to learn each property covered in the lesson; play this with your class and offer a prize for the winning team
• The ninth exercise in a 36-part series

Classroom Considerations

• Allow ample time to watch the video and cover all material, while ensuring learners understand each concept presented

Pros

• Includes a video clip to engage pupils prior to discussing materials and completing practice problems
• Builds off of information presented in the past several lessons and allows pupils to expand knowledge at a steady pace

Cons

• None

Common Core

HSG-CO.C.9 MP7 MP8