please help me solve these questions about angles
http://www.flickr.com/photos/81115255@N00/
please help me solve these questions about angles
2008-06-03 7:32 am
回答 (1)
2008-06-03 8:55 am
✔ 最佳答案
Q32In triangle ABC
72 40 2x = 180 (angles sum of triangle)
x=34 (angle ACE)
angle CEB=40 34=74 (ext. angle, of triangle)
In triagnle EFD
90 74 angle FDE=180 (angles sum of triangle)
angle FDE=16
on line EDB
16 angle CDF 90=180 (adj angles on st.line)
angle CDF=74
收錄日期: 2021-05-01 16:09:44
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