can giai bai tap hinh hoc

W

wendykute

A

ariespisces

[TEX]\large\Delta BNC[/TEX]=[TEX]\large\Delta CMA[/TEX] (c.g.c)
=>[TEX]\widehat{AMC}[/TEX]=[TEX]\widehat{CNB}[/TEX]
=>t/g AMIN nội tiếp
=>[TEX]\widehat{NIM}[/TEX]=120 độ
=>[TEX]\widehat{CIB}[/TEX]=120 độ
mà [TEX]\widehat{COB}[/TEX]=sđ cung BC = 120
=>t/g CIOB nội tip'
:)>-:)>-:)>-:)>-nhớ tks
 
Last edited by a moderator:
You must log in or register to reply here.
Top Bottom