Q3, W2: Geometry (January 14-18)

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #Two
Unit of InstructionUnit 5: Quadrilaterals and Coordinate Geometry
Standard(s) Taught

MAFS.912.G-CO.3.11:  Prove theorems about parallelograms to solve problems.  Theorems include:  opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals.

MAFS.912.G-GPE.2.4:  Use coordinates to prove simple geometric theorems algebraically. Choose appropriate formula to identify the geometric figure and its properties.  Prove or disprove that a figure defined by given points in the coordinate plane is a triangle, rectangle, kite, rhombus, trapezoid, square, etc.

Learning Targets and Learning Criteria
  • Students will learn the properties of parallelograms and understand the differences between types of parallelograms such as rhombus, rectangle, and square.
  • Students will be able to find missing side lengths or angle measures of parallelograms based on the properties of the different types of parallelograms.
  • Students will apply theorems, postulates, or definitions to prove theorems about parallelograms.
Classroom Activities


  • We will go over the distance and midpoint formulas and how to apply them.
  • Together we will do page three where they must know which formula to use to prove that two sides of a quadrilateral are parallel or congruent, etc.
  • Students will do #’s 1-5 on page 5 for homework.


  • Students will create a page for ISN on Quadrilaterals and we will look at and compare the properties of each of the types of quadrilaterals.


  • Students will work in groups to try to prove the Theorems about Parallelograms. 
  • After they work on them for a while, we will go over them together.
  • Students will also create the foldable on Trapezoids and Kites for p. 39 of ISN>
Assignments Due
  • Homework assignment on distance and midpoint is due by Friday, January 18.
Additional Resources

All IEP and ESOL accommodations will be provided daily.