Respuesta :

<2 + <5 = 180  this is a straight line

<2 + 150= 180

subtract 150 from each side

<2 = 30

<2 + <3 + <4 = 180  a triangle is 180 degrees

30 + <3 + 70 = 180

100 + <3 = 180

<3 = 80