Question

Determine a medida do ângulo externo indicado na figura: (a-b-c-d)

Answer 1

Aê=360/n
Aê=360/3
Aê=120

Ai=180.(n-3)/n
Ai=180/3
Ai=60

Ai+Ae=180

A)X+40+60=180
=X=180-100
=X=80

B)X+75+30=180
=X=180-105
=X=75

C)X+65+32=180
=X=180-97
=X=83

D)X+90+45=180
X=180-135
X=45