SubArea: TrianglesLevel: AProject ID: 1103021706Source Problem: 2010015208Accepted: 1Clonable: 1Easy: 1In the triangle ABC, α=80∘ and β=70∘ (see the picture). Determine the measure of the angle between the altitude to the side AB and the altitude to the side BC.70∘120∘30∘60∘