f.1 coordinates 2題

👨🏻‍🏫 學術台數學

TSZ YING

2009-04-19 1:50 am

Find it area. Here are the web site .

http://img18.imageshack.us/img18/451/img5259c.jpg

http://img18.imageshack.us/img18/6193/img5260y.jpg

更新1:

How can you find '3' in the first question?

回答 (1)

用戶7639

2009-04-19 6:41 am

✔ 最佳答案

圖片參考：http://g.imagehost.org/0728/vertices1.gif

=1/2(0-6+25-10+10+6+35)
=1/2(60)
=30 square units

(d)

圖片參考：http://g.imagehost.org/0237/vertices2.gif

=1/2(6+28+56-15+35+15+8+24)
=1/2(157)
=78.5square units

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