幾何(F.1)(列式+步驟+答案)

👨🏻‍🏫 學術台數學

用戶9777

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

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......

回答 (3)

知識就是力量

2010-01-08 3:00 am

Is BC//EF?

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Tony Lai

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

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[匿名]

2010-01-08 2:51 am

I can not see , it is too small
make it biger or I will help

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收錄日期: 2021-04-25 17:02:20
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