The sum of interior angles of a pentagon is ( 5 − 2 ) × 18 0 ∘ = 54 0 ∘ (5−2)×180 ∘ =540 ∘
2 Set up the equation: x + 2x + (x+30) + (x-10) + (x+30) = 540 3 Simplify the equation: 6x + 50 = 540 4 Solve for x: 6x = 490 5 x = 490 6 = 81. 6 ˉ x= 6 490 =81. 67 Hope I was able to help :)
