2010武汉中考10数学怎么做?
10、B
连接BD,AD,使BE⊥CD在e∫ab为直径,∴∠ ACB = 90。∵AC=6,AB=10,根据勾股定理BC=8。∫CD等分∠ACB,∴∠ BCD = 45。∵BE⊥CD,∴CE=BE。∵BC=8,根据勾股定理,CE=BE=4√2,∵AD=BD,AB为直径,∴BD=5√2.在直角三角形BDE中,BD=5√2,BE=4√2,∴DE=3√2.
连接BD,AD,使BE⊥CD在e∫ab为直径,∴∠ ACB = 90。∵AC=6,AB=10,根据勾股定理BC=8。∫CD等分∠ACB,∴∠ BCD = 45。∵BE⊥CD,∴CE=BE。∵BC=8,根据勾股定理,CE=BE=4√2,∵AD=BD,AB为直径,∴BD=5√2.在直角三角形BDE中,BD=5√2,BE=4√2,∴DE=3√2.