Respuesta :
In a quadrilateral all angels must equal 360 degress. So by adding your angels up and then subtracting them from 360, you will find the missing angle.
34 + 108 + 65 = 207
360-207 = 153
Your unknown angle is 153 degrees
34 + 108 + 65 = 207
360-207 = 153
Your unknown angle is 153 degrees
Well since it is a quadrilateral, the degrees equal 360. So add 108 + 34 + 65 = 207. Then subtract 207 from 360. 360 - 207 = 153. So 153 is your missing angle. To check just add 153 + 65 + 34 + 108 = 360.