Answer:
C
Explanation:
first , calculate the measure of ∠ A
the sum of the 3 angles in a triangle = 180° , that is
∠ A + 80° + 60° = 180°
∠ A + 140° = 180° ( subtract 140° from both sides )
∠ A = 40°
the shortest side in the triangle is the side opposite the smallest angle in the triangle.
the smallest angle is ∠ A = 40° , then
the shortest side is the side opposite ∠ A , that is BC