Question

use the figure to identify another name for $\angle 3$.
a) $\angle acd$
b) $\angle adc$, $\angle cda$
c) $\angle acd$, $\angle acb$
d) $\angle ade$, $\angle edc$

Explanation:

To name an angle, we can use three points where the middle point is the vertex of the angle. For \(\angle3\), the vertex is \(D\), and the other two points on the sides of the angle are \(A\) and \(C\). So, we can name it as \(\angle ADC\) (with vertex \(D\)) or \(\angle CDA\) (still with vertex \(D\)).

Answer:

B. \(\angle ADC,\angle CDA\)