Mathematics
Junior High
Resolved
求這題的詳解
ONDISH
point
·
5 平行線截角性質的應用
如右圖,L // Ly,若∠1=80°,∠2=60°,
且BO平分∠DBC,則∠3=?
我
14- 100
O
(p.180例3 p.181例4
L
A
B
Co
so
1260
4-1 平行
D
LI
-L₂
O
(p.184例 5
51
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