Q3, W2: January 10-14 Pre-Algebra

TeacherKristin Andreason
Subject AreaGrade 8 Pre-Algebra
Grade Level8
Week #January 10-14
Unit of InstructionFocus 7: Angle Pair Relationships
Standard(s) Taught

MAFS.8.G.1.5: Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.  For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals and why this is so.

Learning Targets and Learning Criteria
  • Informally prove the anglesum theorem, the properties of angles when parallel lines are cut by a
    transversal and the angle-angle criterion for similar triangles.
  • Prove that the sum of any triangle’s interior angles will have the same measure as a straight angle.
  • Make conjectures regarding the relationships and measurements of the angles created when two
    parallel lines are cut by a transversal.
  • Apply proven relationships to establish minimal properties to justify similarity.
  • Present informal arguments as to whether or not triangles are similar based on Angle-Angle criterion.
Classroom Activities


  • I will give students notes on Angle Relationships and we will go over them
  • I will explain the similar triangles as it relates to dilations
  • We will do some of IXL S.5 and S.6 together to check for understanding
  • We will review Parallel Lines Cut By a Transversal
  • Students will finish IXL’s Q.9 and Q.12 (of not) and then work on IXL Q.17
  • I will preview the worksheet on Angles and Equations they will do tomorrow


  • Students will do a worksheet on Angles and Equations (and coloring activity)


  • Students will do IXL’s Q.15 and Q.18 (using their notes on Angle Relationships)
  • Students will then finish the coloring activity (Angles and Equations)
Assignments Due
  • IXL’s Q.15 and Q.18
  • Angles and Equations Activity
Additional Resources

All IEP and ESOL accommodations will be provided daily.

Khan Academy videos – type any topic in search bar followed by Khan Academy to find an instructional video for additional support. https://www.khanacademy.org/

IXL – Provides support for any grade level math standard.

Edgenuity – https://www.edgenuity.com/