photo via HPS [http://www.heresparkslope.com/home/2012/6/28/closed-for-business-triangle-sporting-goods-182-flatbush-ave.html] Triangle Sporting Goods at the intersection (triangle) of Dean, Flatbush, and Fifth, is closed forever [http://www.heresparkslope.com/home/2012/6/28/closed-for-business-triangle-sporting-goods-182-flatbush-ave.html] , reports Here’s Park Slope. The store, which opened in 1916 selling