Q3, W9: Geometry, March 4-8

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #9
Unit of InstructionUnit 6: Two-Dimensional Measurements
Standard(s) Taught

MAFS.912.G-C.2.5  Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.

Learning Targets and Learning Criteria
  • Students will use similarity to derive the fact that the length of the arc intercepted by an angle is proportional to the radius.
  • Students will apply similarity to solve problems that involve the length of the arc intercepted by an angle and the radius of a circle.
  • Students will derive the formula for the area of a sector. Students will use the formula for the area of a sector to solve problems.

 

Classroom Activities

Monday/Tuesday:

  • We will finish area of regular polygons (octagons and pentagons).
  • We will review special right triangles.
  • Students will do practice problems on finding area of regular polygons.

Wednesday:

  • Students will do corrections on assignments and/or finish any missing assignments.

Thursday/Friday:

  • Students will do a problem on area of a regular octagon and pentagon and we will go over.
  • Students will create a foldable on Arc Length and Sector Area and do the practice problems on the foldable.
Assignments Due
  • Any missing assignments will be turned in.
Additional Resources

All IEP and ESOL accommodations will be provided daily.