Hi, Welcome! Thank you for using the site. From the Law of Cosines, the length of b is: b^2 = a^2 + c^2 - 2ac*cosB b^2 = (4.24)^2 + (5.61)^2 - 2(4.24)(5.61)cos(25.4) b^2 = 6.4755 b = 2.54 m From the Law of Sines, the measure of angle A is: sin A / 4.24 = sin 25.4 / 2.54 sin A = 4.24 * sin 25.4 / 2.54 sin A = 0.7160 A = arcsin(0.7160) A = 45.7 Finally, the measure of angle C is: C = 180 - A - B C = 180 - 45.7 - 25.4 C = 108.9 Thanks, Ryan