(中四)圓的問題

👨🏻‍🏫 學術台數學

2007-06-08 6:09 am

http://i150.photobucket.com/albums/s87/mllokloks/2.jpg

AB與兩個圓分別相切於P和Q , O , O'是圓心 . 求x

回答 (3)

2007-06-08 6:16 am

✔ 最佳答案

角OPQ = 90
角O'QP = 90
角OO'Q = 角POO' = 36
x = 1/2 角OO'Q = 18

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2007-06-08 6:18 am

x = 36/2
= 18

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2007-06-08 6:16 am

連接QO'
角QO'O=角POO'=36
所以X=36/2=18

參考: me

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