圓形求角度 麻煩大家幫幫忙....

2009-06-27 11:08 pm
http://img218.imageshack.us/img218/8853/ocaz.png

在圖中,直徑AB平分弦CD,並與CD相交於M
若 ∠OCM=32。 求∠OCA

麻煩大家幫幫忙....Thank you

回答 (2)

2009-06-27 11:23 pm
✔ 最佳答案
As follows:

圖片參考:http://i707.photobucket.com/albums/ww74/stevieg90/07-17.gif
2009-06-27 11:27 pm
OMC=90
COA=90+32
=122
CO=OA
OCA=(180-122)/2
=29


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