Quadrilateral: Difference between revisions
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A '''quadrilateral''' is a four-sided [[polygon]] | ==Definition== | ||
A '''quadrilateral''' is a four-sided [[polygon]]. | |||
==Types of quadrilaterals== | |||
===Kite=== | |||
{{main|Kite}} | |||
A kite is a quadrilateral with two pairs of adjacent [[congruent]] [[edge]]s. | |||
===Cyclic Quadrilateral=== | |||
{{main|Cyclic quadrilateral}} | |||
A cyclic quadrilateral is a [[quadrilateral]] that is [[cyclic]]. | |||
===Parallelogram=== | |||
{{main|Parallelogram}} | |||
A parallelogram is a quadrilateral with two pairs of [[parallel]] [[edge]]s. | |||
===Rhombus=== | |||
{{main|Rhombus}} | |||
A rhombus is an [[equilateral]] parallelogram. | |||
===Rectangle=== | |||
{{main|Rectangle}} | |||
A rectangle is an [[equiangular]] parallelogram. | |||
===Square=== | |||
{{main|Square (geometry)}} | |||
A square is any [[figure]] that is both a rectangle and a rhombus. | |||
== Introductory topics == | == Introductory topics == | ||
* [[Cyclic quadrilateral | * [[Cyclic quadrilateral]]s | ||
=== Resources === | === Resources === | ||
| Line 11: | Line 31: | ||
== Intermediate topics == | == Intermediate topics == | ||
* [[Ptolemy's Theorem]] | * [[Ptolemy's Theorem]] | ||
* [[Brahmagupta's formula]] | |||
=== Resources === | === Resources === | ||
==== Books ==== | ==== Books ==== | ||
* [http://www.amazon.com/exec/obidos/ASIN/0486691543/artofproblems-20 Challenging Problems in Geometry] -- A good book for students who already have a solid handle on elementary geometry. | * [http://www.amazon.com/exec/obidos/ASIN/0486691543/artofproblems-20 Challenging Problems in Geometry] -- A good book for students who already have a solid handle on elementary geometry. | ||
* [http://www.amazon.com/exec/obidos/ASIN/0883856190/artofproblems-20 Geometry Revisited] -- A classic. | * [http://www.amazon.com/exec/obidos/ASIN/0883856190/artofproblems-20 Geometry Revisited] -- A classic. | ||
{{stub}} | |||
[[Category:Definition]] | |||
[[Category:Geometry]] | |||
Latest revision as of 19:14, 16 January 2025
Definition
A quadrilateral is a four-sided polygon.
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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