In the figure, OABC is a quarter of a circle that touches PQ at B. If PQ = 25 cm and OP = 20 cm, then AP =
Ans: 8 cm
Show me the step please
圖片參考：http://imgcld.yimg.com/8/n/HA00962128/o/701012070050113873422950.jpg
F5 Maths
2010-12-07 11:35 pm
回答 (1)
2010-12-07 11:44 pm
✔ 最佳答案
Obviously OQ=15 cm. The key point is to find the radius of the circle (OA or OB). Notice that OB is prependicular to PQ and consider the area of triangle OPQ, we have OP*OQ=PQ*OB=>20*15=25OB=>OB=12So AP=20-12=8 cm
收錄日期: 2021-04-16 11:57:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101207000051KK00501