馃摌 geometry, statistics
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Geometry Statistics
1. **讛爪讛专转 讛讘注讬讛:**
讬砖 诇谞讜 讗讜诇诐 讛讜驻注讜转 讘爪讜专转 讟专驻讝 ABCD 讻讗砖专 AB 诪拽讘讬诇 诇-DC, 讜谞转讜谞讬诐: ABMF 讛讜讗 诪诇讘谉, AF = 54 诪讟专, AD = 58.5 诪讟专, DC = 80 诪讟专.