If two angles of a triangle are 2/3 radian and 1/7 radian. Find the 3 rd angle in degree

The sum of all interior angles of a triangle is 180° i.e. Π radian. So the third angle = Π-(sum of other two angles) =(22/7)-((2/3)+(1/7))=(22/7)-(17/21) =49/21=7/3 radian