What's the correct letter name for ð1 below?

D. ∠ABC

Step-by-step explanation:

We are given a figure consisting of rays AB, CB and DB having a common end point B.

It is required to find the value of 1 marked in the figure.

As, we can see, 1 is representing the region between the rays AB and CB.

We know that, an 'angle' is a figure that joins two rays having one common end-point.

This gives that 1 represents an angle between AB and CB.

So, 1 is ∠ABC.

Hence, the correct letter for 1 is D.

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