Answer:
Step-by-step explanation:
The sum of all the internal angles of a convex octagon must equal 1080.
You'll want to add all the angles together and then solve.
[tex](x+55)+(3x+20)+4x+(4x-10)+(6x-55)+(3x+52)+3x+(2x+30) = 1080[/tex]
Just combine like terms and then solve for x.