圖片參考：http://imgcld.yimg.com/8/n/HA05379968/o/701001070111813873391350.jpg
更新1:
回應 「ღ.｡.:* 知識就是力量╭★ 」: ABE、ACF、ADG、BCD、EFG是直線。 But I don't is it BC//EF......
幾何(F.1)(列式+步驟+答案)
2010-01-08 2:44 am
求x+y。 (列式+步驟+答案)
圖片參考：http://imgcld.yimg.com/8/n/HA05379968/o/701001070111813873391350.jpg
圖片參考：http://imgcld.yimg.com/8/n/HA05379968/o/701001070111813873391350.jpg
回答 (3)
2010-01-08 3:00 am
Is BC//EF?
2010-01-08 2:52 am
angle CAB+angle CFE +angle FEB=180(angle sum of triangle)
40+70+angle FEB =180
angle FEB=70
angel FEB +angle CFE+angle CBE+angle FCE=360
70+70+150-x+130-y=360
420-x-y=180
-x-y=180-240
-(x+y)=-240
x+y=240
40+70+angle FEB =180
angle FEB=70
angel FEB +angle CFE+angle CBE+angle FCE=360
70+70+150-x+130-y=360
420-x-y=180
-x-y=180-240
-(x+y)=-240
x+y=240
2010-01-08 2:51 am
I can not see , it is too small
make it biger or I will help
make it biger or I will help
收錄日期: 2021-04-25 17:02:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100107000051KK01118