In triangle abc, angle c = (5x), angle b = x, and angle c = (3x). what is angle c

60 degrees

Step-by-step explanation:

a+b+c = 180 degrees therefore 5x + x + 3x = 9x

9x=180 (divide) - -> x=20

since c = 3x substitute in 20 for x - -> 3 (20) = 60 degrees for angle c