Answer:
A triangles angle always equal to 180 degrees. So if you add up what you already have which is 80+40=120
Could you attach an image of the slope? Because i dunno what lesson you're on....
:/
3.02
x 10
-------
000
+302x
______
30.20
7. adjacent
8.127°
Step-by-step explanation:
adjacent angles on a straight line add up to 180°
180-53=127°