8-2=6
180×6=1080 degrees
sum of interior angle of an octagonal box = 1080 degrees
the answer is false hopes this helps
Let's plug x= -1, y= 4 in the inequation, we have:
4< 2*(-1)+5
⇒ 4< -2+5
⇒ 4< 3 (false)
Therefore, (-1,4) is not a solution of the inequation y<2x+5~
