Triangle ABO is isosceles. Angle AOB=360-(90+30+3*180/5)=132. So angle ABO=(180-132)/2=24. Angle ABC=24+30=54.
Triangle ABO is isosceles. Angle AOB=360-(90+30+3*180/5)=132. So angle ABO=(180-132)/2=24. Angle ABC=24+30=54.
• 很好 -yma16- ♂ (0 bytes) () 01/21/2024 postreply 16:15:16
• 勞駕你再想想怎麽求角BAC. -yma16- ♂ (0 bytes) () 01/21/2024 postreply 19:26:02
• 解不了,好像必須靠複雜的計算,期待高手來解 -monseigneur- ♂ (0 bytes) () 01/21/2024 postreply 21:11:47
• 我做了。圖是倒的。我不會把它變正。在我的電腦裏是正的。 -yma16- ♂ (81 bytes) () 01/22/2024 postreply 08:12:35
• 謝謝分享,我也是這麽想的,但因為計算複雜而放棄了 -monseigneur- ♂ (0 bytes) () 01/22/2024 postreply 09:44:25
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy