yen80
18.11.2019 •
Mathematics
How do you know 37? i don't understand, do you add another line connecting it to make a whole triangle or ..i don't understand..
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Ответ:
The 3th angle of the triangle is the supplement of 3x-8:
180-(3x-8)=180-3x+8=188-3x
The sum of all angles of the triangle is 180
180=2x+21+188-3x
==>180=-x+21+188
==>x=21+188-180
==>x=21+8
==>x=29
Ответ: