Q2, W7: January 5 – 8 Geometry

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #January 5-8
Unit of InstructionUnit 3: Similarity
Standard(s) Taught

MAFS. 912.G-SRT.1.2:  Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

MAFS.912.G-SRT.1.3:  Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.

MAFS.912.G-SRT.2.5: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

 

Learning Targets and Learning Criteria
  • define similarity as a composition of rigid motions followed by dilations in which angle measure is preserved and side length is proportional.
  • identify corresponding sides and corresponding angles of similar triangles.
  • demonstrate that in a pair of similar triangles, corresponding angles are congruent (angle measure is preserved) and corresponding sides are proportional.
  • determine that two figures are similar by verifying that angle measure is preserved and corresponding sides are proportional.
  • show and explain that when two angle measures are known (AA), the third angle measure is also known (Third Angle Theorem).
  • conclude and explain that AA, SSS, and SAS similarity are sufficient conditions for two triangles to be similar.
  •  distinguish between congruence and similarity theorems.
  •  use similarity criteria for triangles to solve problems.  

  • Students will use similarity criteria for triangles to prove relationships in geometric figures.

Classroom Activities

Tuesday:

  1. Students will begin a Scale Drawing project to practice dilations.

Wednesday:

  1. Students will log onto Zoom session
  2. Students will create a foldable on Similar Triangles
  3. Students will also do a guided notes page on ratios and proportions
  4. Students will do IXL P.2 and P.4

Thursday/Friday:

  1. Students will log onto Zoom session
  2. Students will do guided notes on Similar Polygons
  3. Students will do the Similar Triangles Scavenger Hunt
Assignments Due
  • IXL P.2 and P.4 due on by January 8
  • Similar Triangles Scavenger Hunt due by Monday/Tuesday January 11/12
Additional Resources

All IEP and ESOL accommodations will be provided daily.