Properties of Parallelograms (Day 2)

Lesson Prep

Lesson Details

• Duration: 50 minutes

• Learning Goal: Introduce proving quadrilaterals are parallelograms and apply understanding to solve problems.

Prework

• Read Jennifer Wilson's breakdown of Is this a rectangle?

• Watch the embedded video above to see how we use formative assessment

Answer Keys

• Link to Answer Keys

Classwork

• Estimation – Grammichele

• Warm Up that includes…

  • Is this a rectangle? (Illustrative Mathematics)

• Notes Preparation

  • Notes

• Ungraded Formative Assessment / Practice

Standards

Common Core

• HSG.CO.C.11 – Prove theorems about parallelograms. 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.

TEKS

• G.5(A) – investigate patterns to make conjectures about geometric relationships, including angles formed by parallel lines cut by a transversal, criteria required for triangle congruence, special segments of triangles, diagonals of quadrilaterals, interior and exterior angles of polygons, and special segments and angles of circles choosing from a variety of tools

• G.6(E) – prove a quadrilateral is a parallelogram, rectangle, square, or rhombus using opposite sides, opposite angles, or diagonals and apply these relationships to solve problems