Quadrilaterals
Four-sided polygons
Start with the basics and progress through 2 lessons. Each lesson builds on the previous one.
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Test Your Knowledge
10 questions, new mix each time (from 30)
In This Topic (2 lessons)
Types of Quadrilaterals
Learn to identify and classify different types of quadrilaterals based on their sides, angles, and special properties.
Properties of Rectangles
Learn the defining properties of rectangles including equal opposite sides, right angles, and diagonal relationships.
Quadrilaterals are four-sided polygons with special properties depending on their type. From general quadrilaterals to parallelograms, rectangles, rhombuses, squares, and trapezoids, each has unique characteristics involving parallel sides, equal angles, and diagonal properties.
What You'll Learn
- Classify quadrilaterals by their properties
- Identify relationships between quadrilateral types
- Calculate areas of various quadrilaterals
- Use properties to find missing measurements
- Apply quadrilateral properties in proofs
Frequently Asked Questions
How are quadrilateral types related?
A square is a special rectangle AND a special rhombus. A rectangle and rhombus are both special parallelograms. All are quadrilaterals.
What defines a parallelogram?
A parallelogram has two pairs of parallel sides. This causes opposite sides to be equal and opposite angles to be equal.
What is unique about trapezoid diagonals?
In an isosceles trapezoid, the diagonals are equal in length, though they do not bisect each other like in a parallelogram.