Q3, W1: January 6-10 Geometry

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #January 6-10
Unit of InstructionUnit 4: Right Triangles and Trigonometry
Standard(s) Taught

MAFS.912.G-SRT.2.4:  Prove theorems about triangles. (Theorems include: Triangle Proportionality Theorem or Side Splitter Theorem – a line parallel to one side of a triangle divides the other two proportionally.)

Learning Targets and Learning Criteria
  • define geometric mean.
  • find measures in similar right triangles using geometric mean.
  • apply theorems, postulates, or definitions to prove theorems about triangles, including proving The Pythagorean Theorem using triangle similarity.
Classroom Activities


  • We will watch a video on Geometric Mean
  • We will watch the Section 7, Topic 6 video on Geometry Nation (Right Triangles Similarity–Part 1)  
  • We will watch a YouTube video (Triangles:  Similar Right Triangles, Geometric Mean) to understand the Right Triangle Altitude Theorem)
  • Students will do a Geometric Mean maze


  • We will review the Altitude Rule and the Leg Rule for the Geometric Mean Theorem
  • Students will do IXL P-New (Similarity and Altitudes in Right Triangles)


  • Students will do Section 7, Topic 1 in Geometry Nation, writing down notes and will put this page in their ISN
  • Students will then do Section 7, Topic 6 and Section 7, Topic 7 in the Geometry Nation Practice book on pages 132-134 (just #5 on page 134)
  • Students can finish the IXL if they complete the workbook pages
Assignments Due
  • Section 7, Topic 6 of Geometry Nation should be complete and in ISN by January 10.
  • Section 7, Topic 1 of Geometry Nation should be complete and in ISN by January 10.
  • IXL P-New (Similarity and Altitudes in Right Triangles) due by January 10.
Additional Resources

All IEP and ESOL accommodations are provided daily.