Q3, W8: March 15-18 Geometry

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #March 15-18
Unit of InstructionUnit 6: Two-Dimensional Measurements
Standard(s) Taught

MAFS.912.G-GMD.1.1:  Give an informal argument for the formulas for the circumference of a circle, area of a circle, volume of a cylinder, pyramid, and cone. (Use dissection arguments, Cavalieri’s principle, and informal limit arguments.)

 

Learning Targets and Learning Criteria
  • define regular polygons.
  • inscribe a regular polygon in a circle and break it into many congruent triangles to find its area.
  • explain and use the dissection method on regular polygons to generate an area formula for regular polygons A = ½ × apothem × perimeter (A = aP).
  • calculate the area of a regular polygon A = ½ × apothem × perimeter   (A = ½aP).
  • use pictures to explain that a regular polygon with many sides is nearly a circle, its perimeter is nearly the circumference of a circle, and that its apothem is nearly the radius of a circle.
  • substitute the “nearly” values of a many sided regular polygon into   A = ½ × apothem × perimeter (A = ½aP) to show that the formula for the area of a circle is A = LaTeX: \piπr2.
Classroom Activities

Monday/Tuesday:

  1. Students will log onto the Zoom session.
  2. Students will take the Summative on Quadrilaterals.
  3. We will watch a video showing how we get the formula for area of a circle.
  4. I will give students notes on Regular Polygons.
  5. Students will take notes on area of triangles, squares, and hexagons.
  6. Students will create a foldable on Area of Regular Polygons with practice examples.

Wednesday:

  1. Students will log onto the Zoom session.
  2. Students will work on a scavenger hunt on Area of Regular Polygons.

Thursday:

  1. Students will log onto the Zoom session.
  2. Students will finish scavenger hunt.
  3. Students can work on other missing assignments when they finish.
Assignments Due
  • Quadrilaterals Summative must be taken by Thursday (will be given in class on Monday/Tuesday).
  • Scavenger hunt on Area of Regular Polygons due on February 27/28.
Additional Resources

All IEP and ESOL accommodations are provided daily.