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

Answer: 84.4 cm² (nearest tenth)