Unknown Angle Proofs—Proofs with Constructions

Provide your emerging mathematicians with the tools to learn as they incorporate auxiliary lines to solve unknown angle proofs in this continuing segment. They decipher information from a diagram to uncover the missing pieces and complete each problem, along with providing a correct justification. 

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CCSS: Designed
Instructional Ideas

  • Locate additional problems to present as samples for extra practice
Classroom Considerations

  • Assumes lesson entitled "Unknown Angle Proofs-Writing Proofs" has been covered prior to this lesson
  • Ensure each person fully understands the importance of justification as they work sample problems and discuss prior to completing an assessment
  • The tenth installment in a 36-part series
Pros

  • Builds on a previous lesson about angle proofs and provides additional sample problems to ensure the class understands concepts
  • Contains a detailed answer key to help with discussions and allows individual learning, if desired
Cons

  • None
Common Core