Question

1. identify the side or angle that is common to △abc and △cda.

∠dac
(overline{ad})
(overline{ac})
∠a

Explanation:

Step1: Analyze the two triangles

We have \(\triangle ABC\) and \(\triangle CDA\). We need to find the common side or angle.

Step2: Check each option

• \(\angle DAC\) is an angle in \(\triangle CDA\) and not a common - angle to both triangles.
• \(\overline{AD}\) is a side of \(\triangle CDA\) and not common to \(\triangle ABC\).
• \(\overline{AC}\) is a side that is shared by both \(\triangle ABC\) and \(\triangle CDA\).
• \(\angle A\) is not well - defined as \(\triangle ABC\) and \(\triangle CDA\) have different angles at the vertex \(A\).

Answer:

C. \(\overline{AC}\)