The area of a triangle by definition is: A = (1/2) * (b) * (h) Where, b: base h: height For the case of oblique triangles we must find the height: There are two ways to find them: h = c * sine (B) h = b * sine (C) Substituting we have: A = (1/2) * (a) * (c * sine (B)) A = (1/2) * (a) * (b * sine (C)) Answer: Two ways to write the area are: A = (1/2) * (a) * (c * sine (B)) A = (1/2) * (a) * (b * sine (C)) Note: These results are not among the options. It was probably a mistake writing the question.
