- In geometry a quadrilateral is a four-sided polygon, having four edges (sides) and four corners (vertices). The word is derived from the Latin words quadri, a variant of four, and latus, meaning “side”. It is also called a tetragon, derived from greek “tetra” meaning “four” and “gon” meaning “corner” or “angle”, in analogy to other polygons (e.g. pentagon). Since “gon” means “angle”, it is analogously called a quadrangle, or 4-angle. A quadrilateral with vertices A, B, C and D is sometimes denoted as ABCD.
- Delridge, Seattle (Wikipedia)
Delridge is a district in Seattle, Washington, United States that stretches along Delridge Way, an arterial that follows the eastern slope of the valley of Longfellow Creek, from near its source just within the southern city limits north to the West Seattle Bridge over the Duwamish River. It is generally associated with the neighborhing district of West Seattle, or even considered a sub-district of West Seattle.
- Pentagon (Wikipedia)
In geometry, a pentagon (from the Greek πέντε pente meaning five and γωνία gonia meaning angle) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.
- Triangle (Wikipedia)
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted △ABC.
