Mathematics — first biennium · Lesson
Quadrilateral classes are inclusive: a square is also a rectangle, a rhombus and a parallelogram.
Prerequisites: Parallelism and triangles
Goal: Classify quadrilaterals using an inclusive hierarchy of properties.
In this lesson: Classify quadrilaterals using an inclusive hierarchy of properties.
New concept: Quadrilateral classes are inclusive: a square also satisfies the definitions of rectangle, rhombus and parallelogram. In exercises, choose the most specific name first without forgetting the broader classes.
How to proceed: Do not treat the categories as disjoint: find the most specific property first and then remember the inclusions.
You can already assume: Parallelism and triangles.
Completed exercises: 0/5 · Correct on first attempt: 0
Do not treat the categories as disjoint: find the most specific property first and then remember the inclusions.
Data / situation: It has two pairs of opposite parallel sides, with no further information.
ConceptStep separates what is required from what is recommended or useful as reinforcement. Only required prerequisites block your progress.
Relationships: solid line = required · dashed line = recommended · dotted line = reinforcement.