Pentagon Pentagon In geometry, a pentagon (from the Greek πέντε "pente" and γωνία "gonia", meaning "five" and "angle") is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simple or self-intersecting. A self-intersecting "regular pentagon" (or "star pentagon") is called a pentagram. A "regular pentagon" has Schläfli symbol {5} and interior angles are 108°. A "regular pentagon" has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72°, 144°, 216° and 288°). The diagonals of a convex regular pentagon are in the golden ratio to its
Sum of the Parts Sum of the Parts Sum of the Parts is an album by tenor saxophonist/composer-arranger Ed Summerlin, released in 1998 on the Ictus label. "Los Angeles Times" reviewer, and Summerlin's onetime bandmate,Don Heckman, gave the album 3 stars and paid tribute to his erstwhile collaborator. Veteran tenor saxophonist-composer Ed Summerlin has been effectively venturing through the jazz avant-garde for more than three decades. "Sum of the Parts" displays the complexities and inherent swing in his dissonant, contrapuntal music. Resonant with influences from George Russell and Ornette Coleman, it nonetheless comes together as one of the genuinely individual voices in the arena