Quadrilateral: Difference between revisions
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A parallelogram is a quadrilateral with two pairs of [[parallel]] [[edge]]s. | A parallelogram is a quadrilateral with two pairs of [[parallel]] [[edge]]s. | ||
===Rhombus=== | ===Rhombus=== | ||
{{main|Rhombus} | {{main|Rhombus}} | ||
A rhombus is an [[equilateral]] parallelogram. | A rhombus is an [[equilateral]] parallelogram. | ||
===Rectangle=== | ===Rectangle=== | ||
Revision as of 19:18, 6 October 2024
Definition
A quadrilateral is a four-sided polygon. Some special quadrilaterals include squares, rectangles, rhombi, parallelograms, trapezoids, kites, and cyclic quadrilaterals.
Types of quadrilaterals
Kite
- Main article: Kite
A kite is a quadrilateral with two pairs of adjacent congruent edges.
Cyclic Quadrilateral
- Main article: Cyclic quadrilateral
A cyclic quadrilateral is a quadrilateral that is cyclic.
Parallelogram
- Main article: Parallelogram
A parallelogram is a quadrilateral with two pairs of parallel edges.
Rhombus
- Main article: Rhombus
A rhombus is an equilateral parallelogram.
Rectangle
- Main article: Rectangle
A rectangle is an equiangular parallelogram.
Square
- Main article: Square (geometry)
A square is any figure that is both a rectangle and a rhombus.
Introductory topics
Resources
Books
Intermediate topics
Resources
Books
- Challenging Problems in Geometry -- A good book for students who already have a solid handle on elementary geometry.
- Geometry Revisited -- A classic.
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