- The PNW is a beautiful place to wander! From the North Cascades to the Redwoods, we’ve got it all: dry desert, coastal rainforests, high alpine volcanoes, deep gorges, and old growth forests. We’re here to share our photos, experiences, and stories of hiking and backpacking in the PNW.
- Quadrilateral (Wikipedia)
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.