Octagon has 8 sides so the sum of the angles of the octagon is 180(8-2)=180 (6)=1080 degrees
X + x+1 + x + 2 = 20
3x + 3 = 20
3x = 17 but can't start with x = 6 because 6+7+8 > 20,
so have start with 5 + 6 + 7 = 18 are the 3 sides.
What is being solved for is r.
Fractional number equivalent to 21.6<span> is </span><span>108/<span>5. This is because 108/5=21.6...
Hope this helps! :-)</span></span>
The answer will be C. I hope this helped you! ^^
