Given δabc, m∠a = 120°, b = 13 cm, and c= 15 cm. find the triangle's area. round to the nearest tenth.

Refer to the diagram shown below.

m∠A = 120°
b = 13 cm
c = 15 cm

From the Law of Sines, the area of the triangle is
Area = (1/2)*b*c*sin(A)
         = 0.5*13*15*sin(120°)
         = 84.4375 cm²

84.4 cm² (nearest tenth)

I’m pretty sure the slope would be 1 since the x and y values increase by 1