First, we have to find what x equals. If all the angles add up to 180°, then we can make the equation 2x+2x+6x=180. If we combine like terms, the equation simplified to 10x=180. If we divided both sides by 10, we get that x=18. Now, we can plug in x in 2x to get 2(18). 2×18=36. Angle C is 36°!
