Area of the triangle formed by (3,2), (3,-4) and (7,2) is

Question

Professor PC Thomas Classes · Answer

Area $= \frac{1}{2}|x_1(y_2-y_3) + x_2(y_3-y_1) + x_3(y_1-y_2)| = \frac{1}{2}|3(-4-2) + 3(2-2) + 7(2-(-4))| = \frac{1}{2}|-18 + 0 + 42| = 12$ sq units.