Question

Find the measurement of ∠D and ∠C

Answer 1

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.

• $3x+15=180$
• $3x=165$
• $x=55$°

Thus ∠C = 55°

Knowing that supplementary angles add to 180°, we set up the equation:

• $55+D=180$
• $D=125$°

Thus ∠D = 125°