Anyone knows how to do it......many thanks^^
(a) Draw a quadrilateral OABC with vertices O(0,0), A(3,5), B(7,8) and C(9,0) on a rectangular coordinate plane.
(b) Find the area of quadrilateral OABC.
Math Problem
2012-03-12 5:06 pm
回答 (1)
2012-03-12 7:36 pm
✔ 最佳答案
(a) 點都比埋你, 畫圖唔會唔識呱=.=(b) Area of quadrilateral OABC
|0 0|
|9 0|
=(1/2) |7 8|
|3 5|
|0 0|
=(1/2)[(0+72+35+0)-(0+0+24+0)]
=41.5 sq units
收錄日期: 2021-04-21 22:36:04
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120312000051KK00118