Question 15
Triangle $ABC$ is equilateral. $D$ is a point outside triangle $ABC$ such that $AC=AD$. Given $\angle CDB=x$, find $x$.
The source lists these choices: (A) $30^\circ$, (B) $34^\circ$, (C) $36^\circ$, (D) $40^\circ$, (E) $45^\circ$.
The source does not specify which arc contains D, so its conditions do not determine a unique angle. This item is assessed manually: explain the possible cases rather than assuming a missing position condition.
The source lists these choices: (A) $30^\circ$, (B) $34^\circ$, (C) $36^\circ$, (D) $40^\circ$, (E) $45^\circ$.
The source does not specify which arc contains D, so its conditions do not determine a unique angle. This item is assessed manually: explain the possible cases rather than assuming a missing position condition.