Solve for Unknown Angles—Angles and Lines at a Point

How do you solve for an unknown angle? For this sixth installment of a 36-part series, young mathematicians use concepts learned in middle school geometry to set up and solve linear equations to find angle measures.

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CCSS: Designed
Instructional Ideas

  • Use this resource as a review assignment
  • Print out the table of angle relationships for pupils to have as a resource
Classroom Considerations

  • The lesson assumes that class members can fluently solve linear equations with rational coefficients

  • Resource includes plenty of exercises for both guided and independent practice
  • Explanation of processes leads to proof techniques used in later lessons

  • No hands-on activity to engage students
Common Core