2, the vertex angles are equal
[homework] 1, d
2、C
3、? Freedom? AOF? BOE
4、( 1) 50 130 (2) 20
5. Can you tell from the isocenter angle? DOB=? AOC=28? .
Because? DOE=? Dobby, so? DOE=28? .
Because? AOC+? AOE+? DOE= 180? ,
So what? AOE= 124? .
Because we broke up again? AOE, so? EOF= 1/2AOE=62?
[homework] 6, c
7、C
8、 144?
9、 190? 230?
10、 ( 1) 40?
(2) 60?
1 1、 150?
12, the vertex angles are equal from the opposite side, okay? DOB=? AOC= 36? .
Because? DOE:? DOB=5:2, which can be set? DOE= 5x,? DOB=2x,
So 2x=36? , so? = 18? .
So what? BOE=? Is it? DOB=3x=54? .
So what? AOE= 180? -? BOE= 126? 1
13, because oc is divided equally? EOG, so? ECC=? Gulf Cooperation Council.
Because? ACG=? Enemy, so? ACG+? GCC=? FOE+? ECC。
So what? AOC-? FOC again. for what? BOD= 56? ,
So what? FOC=? AOC=? BOD=56?