Answer:
∠D = 125° and ∠C = 55°
Step-by-step explanation:
We should first solve for variable x, which should give us angle C, and then solve for angle D.
- [tex]3x+15=180[/tex]
- [tex]3x=165[/tex]
- [tex]x=55[/tex]°
Thus ∠C = 55°
Knowing that supplementary angles add to 180°, we set up the equation:
- [tex]55+D=180[/tex]
- [tex]D=125[/tex]°
Thus ∠D = 125°
