What is the name of the region between two concentric arcs with the same central angle?

Question

I am wondering what the name for a section of the area between two concentric circles is called? It's essentially an isosceles trapezoid with the "parallel" sides now curved. I have Googled different iterations of "rounded trapezoid" and "2D toroidal section" etc., but have not found a term that I feel suits this shape.

I appreciate everyone's help.

Answer 1

Such a shape is sometimes referred to as a truncated sector or an annular sector. Here is a link to google search results showing the use of the term "truncated sector."

Answer 2

Just guessing, but annular wedge makes sense, as it is to a circular wedge what an annulus is to a circle

Answer 3

The area between two concentric circles is called: an annulus.
So you can call the blue part: a sector of an annulus.

Answer 4

In some contexts it's also called a "Polar Rectangle" since it is the region $(r_0 \leq r \leq r_1) \times (\theta_0 \leq \theta \leq \theta_1)$. That is, it's the product of two polar intervals.