If the area of △PQR is 21sq.units, and the coordinates of R are (4, k),find the two possible values of k P(-4,-3) Q(3,-3)
點做?..
mth..
2007-09-01 3:08 am
回答 (1)
2007-09-01 8:18 pm
✔ 最佳答案
PQ=3-(-4)=7Let h be its height
Hence,
7h/2=21
h=6
Therefore, the possible value of k is 6 and -6.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070831000051KK05247