Question

calcule x e y nos triângulos

Answer 1

a)
180 - 112 = 68
180 - 68 - 38 = 74
74 + y = 180
y = 180 - 74
y = 106
->
180 - 106 - 42 = 32
32 + x = 180
x = 148
b)
180 - 90 - 45 = 45
y = 180 - 45 
y = 135
->
45/2 + 45 + x = 180
22,5 + 45 + x = 189
x = 180 - 67,5
x = 112,5