find the value of x
degree of angles are
143 2x 152 116 125 140 139 and x

Answer:
Total interior angle= 180*(n-2)
=180*(7-2)
=900
x+139+143+2x+152+116+125+140=900
=>3x+815=900
=>3x=900-815
=>x=85/3
=>x=28.3