It's a bisector angle construction.
BD is the Angle Bisector.
Angle bisector - A line which cuts an angle into two equal halves.
Therefore statement C is true.
<h3>C. m∠ABD = m∠CBD</h3>
Step-by-step explanation:
Divide them up, and then after that, the parenthesis mean that you need to multiply them! So I hope that helps!
Please mark as brainlist
It will just be x=1 and y=7