Pentadecagon (Wikipedia)In geometry, a pentadecagon or pentakaidecagon or 15-gon is a fifteen-sided polygon.
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Nooksack River (Wikipedia)The Nooksack River is a river in western Whatcom County of the northwestern U.S. state of Washington, draining extensive valley systems within the North Cascades around Mount Shuksan, Mount Baker and the Twin Sisters, and a portion of Fraser Lowland south of the Canada–United States border.
Rocky pool at the shoreline
