If the angles of a triangle are in the ratio 2:3:5, then find the smallest angle.
36∘
Let the angles be 2x∘,3x∘, and 5x∘
2x+3x+5x=180∘ 10x=180∘ x=180∘10 =18∘
Smallest angle=2x =2×18∘ =36∘