- How to Classify Quadrilaterals,
a selection of answers from the Dr. Math archives.
- Quadrilateral Classification: Definition of a Trapezoid
- What is the correct definition of a trapezoid, and why?
- Inclusive vs. Exclusive
Definitions
- My geometry teacher says that a square is not also a rhombus,
a rectangle, and a parallelogram. Please help!
- Inclusive and Exclusive Definitions
- Are squares rectangles? Are rectangles squares?
- The Six Quadrilaterals
- My daughter forgot her textbook and needs to know the
six types of quadrilaterals.
- Quadrilaterals
- What is 4-sided and has no equal angles?
- Is a Square a Rectangle?
- Are squares rectangles? What is a pentagon?
- Is a Square a Rhombus?
- I've come across different definitions of a "rhombus" that make
it unclear whether a square is a rhombus.
- Describing a Rhombus
- What is a rhombus?
- Rhombus vs. Rhomboid
- What is the difference between a rhombus and a rhomboid?
- Proving Quadrilateral
is a Parallelogram
- We are having a problem with the idea of a quadrilateral having
one pair of opposite sides congruent and one pair of opposite angles
congruent.
- For definitions and diagrams, see:
- Quadrilateral Formulas
- Dr. Math Geometric Formulas FAQ
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