f3 maths

👨🏻‍🏫 學術台數學

2007-11-20 12:58 am

ABCD and EFCG are 2 identicle rectangle , please find out
1.angle ACF
2.ANGLE CAF

更新1:

這不是 mc 來的 .....

更新2:

i know the aswner is 90 degree and 45 degree

回答 (4)

用戶143743

2007-11-20 1:54 am

✔ 最佳答案

both 75 degrees. IF AND ONLY IF triangle ACF it's isosceles triangle.

rectangle ABCD and EFCG is NOT truely identical, it is similar only by ratio. Do you mean and point between F and G? that is ADG(point between F and G) is identical to CEFG?

Is there anymore information?? because I really cannot validly prove my answer is 75 degree.

I found it very interesting, thanks.

參考: me

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