Question

name the marked angle in 2 different ways.

Explanation:

Step1: Recall angle - naming rules

An angle can be named by its vertex letter when there is only one angle at that vertex. When there are multiple angles at a vertex, we use three - letter naming.

Step2: Name the angle using vertex only

Since the vertex of the marked angle is \(D\), one way to name the angle is \(\angle D\).

Step3: Name the angle using three - letter notation

We can name the angle as \(\angle BDC\) (with the vertex \(D\) in the middle).

Answer:

\(\angle D\), \(\angle BDC\)