Unit 8 · Polygons and Quadrilaterals
8.7Classifying Quadrilaterals
Quick Answer
The quadrilateral hierarchy: parallelogram → rectangle, rhombus → square. Trapezoid → isosceles trapezoid. Kite is separate. Every square is a rectangle and a rhombus; every rectangle and rhombus is a parallelogram.
Essential Question
How does the quadrilateral hierarchy show that every property of a general class is inherited by all its special cases?
Learning Goals
- 1Draw and interpret the quadrilateral hierarchy.
- 2Classify a quadrilateral given its properties.
- 3Determine which properties apply to a given quadrilateral.
- 4Use the hierarchy to make valid deductions.
Key Vocabulary
Quadrilateral hierarchy
A diagram showing the subset relationships among quadrilateral types.
Full lesson content coming soon
Worked examples, guided practice problems, a workbook, quiz, and downloadable PDF resources will be added to this lesson in Phase 2. The learning goals and vocabulary above reflect the complete lesson scope.