Question

The vertex of this angle r s t

Answer 1

the vertex is s. it is the middle

Answer 2

The correct option is 2. The vertex of the angle is RST is S.

Explanation:

If an angle is measured about a point, then the point is called angle's vertex, and the angle associated with that vertex is called the vertex angle.

In other words the vertex of ∠abc is b.

From the given figure it is clear that the vertex angle is l and angle RST is measured about a point S. So the vertex of the angle is S.

`\text{Vertex of }\angle RST=S`

The vertex of the angle is RST is S. Therefore the correct option is 2.