Question

alguém me ajuda pfvr​

Answer 1

a)

x+54+42=180°

x+96=180°

x=180-96

x=84°

b)

x+60+40=180°

x+100=180°

x=180-100

x=80°

c)

x+x+10+70=180°

2x+80=180°

2x=180-80

2x=100

x=100/2

x=50°

d)

x+42+71=180°

x+113=180°

x=180-113

x=67°