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Three HKCEE Math Questions
發問:
http://img535.imageshack.us/i/0019fu.jpg/ http://img225.imageshack.us/i/0020s.jpg/ http://img831.imageshack.us/i/0023kl.jpg/ Please show the steps or account for the answers. Thank you.
18. AP+BR=AQ+QR=AB △APO全等於△AQO △BRO全等於△BQO 2(∠AOB)=2∠AOQ+2∠BOQ=∠POQ+∠ROB=∠POR 選 (D) 21. AT^2=AB*AC=9*25=225 AT=15 選 (C) 31 BC與圓交於C，D，CD中點E AB^2=BD*BC 20^2=BD*50 BD=8 CE=(BC－BD)/2=25－4=21 (R+20)*(R－20)=21^2 R^2－400=441 R=29
其他解答:4E350C6F8B48ECA2
Three HKCEE Math Questions
發問:
http://img535.imageshack.us/i/0019fu.jpg/ http://img225.imageshack.us/i/0020s.jpg/ http://img831.imageshack.us/i/0023kl.jpg/ Please show the steps or account for the answers. Thank you.
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最佳解答:18. AP+BR=AQ+QR=AB △APO全等於△AQO △BRO全等於△BQO 2(∠AOB)=2∠AOQ+2∠BOQ=∠POQ+∠ROB=∠POR 選 (D) 21. AT^2=AB*AC=9*25=225 AT=15 選 (C) 31 BC與圓交於C，D，CD中點E AB^2=BD*BC 20^2=BD*50 BD=8 CE=(BC－BD)/2=25－4=21 (R+20)*(R－20)=21^2 R^2－400=441 R=29
其他解答:4E350C6F8B48ECA2
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