math problem
2011-09-26 2:29 pm
圖片參考：http://imgcld.yimg.com/8/n/HA00994367/o/701109260010113875240630.jpg
Find each measure.(degrees)
1.angle AOB
2.angle BOC
3.angle COD
4.angle BOD
5.angle AOD
6.angle AOC
回答 (1)
2011-10-05 5:14 am
✔ 最佳答案
add a line AOV,then (12x-4)+(12x-4)+90=180(degrees)(adj.angles on st.line)180-90=90=(12x-4)+(12x-4)
angle AOB=45 degrees
ang BOC=
AOB=45=12x-4
45+4=12x
48=12x
x=4,so AOB=12*4-4
=48-4=44(degrees)
COD=90-(13*4-9)
COD=47(degrees)
BOD=90 degrees(see,the angles sign)
angle AOD=90+12*4-4
=90+48-4
=134(degrees)
AOC=(12*4-4)+(13*4-9)
=48-4+52-9
=87 degrees
hope can help you ^_^
參考: i do it myself,汗
收錄日期: 2021-04-13 18:16:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110926000051KK00101