Special right triangles 特殊直角三角形
The diamond-shaped metal roof is adopted in Qingdao Gymnasium, which is composed of 60 triangles. The special shape and structure provides a certain degree of difficulty for design and construction.
青岛体育馆屋面是由60个三角形组成的宝石状外形金属屋面，其独特的造型和结构给设计和施工带来一定的难度。
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