Question

Determine o valor de x em cada triangulo

Answer 1

52+2x=180
2x=180-52
x=128:2
x=64 graus

b) 2x+x +90=180
3x=90
x=30

c) x+90+x-13+3x=180
5x=180-90+13
5x=103
x=103:5

x=20,6