28. You do 2x + (4x + 12) = 180. That gets you 6x + 12 = 180. Minus the 12 from both sides. 6x = 168. Divide both sides by 6 then you get 28.
As we know that circumference of circle is 2πr but here radius is R so it will be 2πR
Hope it helps u
Answer:
0.7
Step-by-step explanation:
That is my home work also I will not tell you