Sum of all exterior angles is 360∘^{\circ}∘
360∘^{\circ}∘ (30∘^{\circ}∘ - 40∘^{\circ}∘)
360 - (130∘^{\circ}∘)
230∘^{\circ}∘
remaining is 46∘^{\circ}∘ = 23046\;\frac{230}{46}46230 = 5
5 + 3 = 8 sides; Octagon
