Geometry

👨🏻‍🏫 學術台數學

[匿名]

2015-04-07 3:55 pm

ABC is an acute - angled triangle. D is a point inside ABC such that angle BDC = 180 - angle A. The angle bisector of angle ABD and the angle bisector of angle ACD intersects at M. Prove that angle BMC is a right angle.

回答 (1)

pingshek

2015-04-07 6:17 pm

✔ 最佳答案

The answer is as follows :

圖片參考：https://s.yimg.com/lo/api/res/1.2/7pLoDoW_GsdMYZ6i1i8ouA--/YXBwaWQ9dHdhbnN3ZXJzO3E9ODU-/https://farm8.staticflickr.com/7671/16874177920_116554d97b_o.png

https://farm8.staticflickr.com/7671/16874177920_116554d97b_o.png

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收錄日期: 2021-04-30 17:15:29
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