What is the name of a part of a region between concentric circles?












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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.



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  • $begingroup$
    I don't think it has a known name. If you need one for something you are writing, make one up and tell your reader. "Angular section of an annulus" might do.
    $endgroup$
    – Ethan Bolker
    Dec 6 '18 at 15:08










  • $begingroup$
    It isn't a complete annulus, but part of one?
    $endgroup$
    – DanielOnMSE
    Dec 6 '18 at 15:08






  • 2




    $begingroup$
    annulus sector? This is how the wiki entry of annulus call it.
    $endgroup$
    – achille hui
    Dec 6 '18 at 15:09












  • $begingroup$
    Yes, I'm writing an academic journal paper and some of these terms are out of my wheelhouse. I appreciate the recommendation of defining my term for the reader. I just want to make sure I'm not making up a name for it if a name already exists. Imagine dancing around the word "triangle", haha.
    $endgroup$
    – kreeser1
    Dec 6 '18 at 15:12
















2












$begingroup$


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.



enter image description here










share|cite|improve this question











$endgroup$












  • $begingroup$
    I don't think it has a known name. If you need one for something you are writing, make one up and tell your reader. "Angular section of an annulus" might do.
    $endgroup$
    – Ethan Bolker
    Dec 6 '18 at 15:08










  • $begingroup$
    It isn't a complete annulus, but part of one?
    $endgroup$
    – DanielOnMSE
    Dec 6 '18 at 15:08






  • 2




    $begingroup$
    annulus sector? This is how the wiki entry of annulus call it.
    $endgroup$
    – achille hui
    Dec 6 '18 at 15:09












  • $begingroup$
    Yes, I'm writing an academic journal paper and some of these terms are out of my wheelhouse. I appreciate the recommendation of defining my term for the reader. I just want to make sure I'm not making up a name for it if a name already exists. Imagine dancing around the word "triangle", haha.
    $endgroup$
    – kreeser1
    Dec 6 '18 at 15:12














2












2








2





$begingroup$


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.



enter image description here










share|cite|improve this question











$endgroup$




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.



enter image description here







geometry terminology






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edited Dec 6 '18 at 15:11









Blue

48k870153




48k870153










asked Dec 6 '18 at 15:03









kreeser1kreeser1

10810




10810












  • $begingroup$
    I don't think it has a known name. If you need one for something you are writing, make one up and tell your reader. "Angular section of an annulus" might do.
    $endgroup$
    – Ethan Bolker
    Dec 6 '18 at 15:08










  • $begingroup$
    It isn't a complete annulus, but part of one?
    $endgroup$
    – DanielOnMSE
    Dec 6 '18 at 15:08






  • 2




    $begingroup$
    annulus sector? This is how the wiki entry of annulus call it.
    $endgroup$
    – achille hui
    Dec 6 '18 at 15:09












  • $begingroup$
    Yes, I'm writing an academic journal paper and some of these terms are out of my wheelhouse. I appreciate the recommendation of defining my term for the reader. I just want to make sure I'm not making up a name for it if a name already exists. Imagine dancing around the word "triangle", haha.
    $endgroup$
    – kreeser1
    Dec 6 '18 at 15:12


















  • $begingroup$
    I don't think it has a known name. If you need one for something you are writing, make one up and tell your reader. "Angular section of an annulus" might do.
    $endgroup$
    – Ethan Bolker
    Dec 6 '18 at 15:08










  • $begingroup$
    It isn't a complete annulus, but part of one?
    $endgroup$
    – DanielOnMSE
    Dec 6 '18 at 15:08






  • 2




    $begingroup$
    annulus sector? This is how the wiki entry of annulus call it.
    $endgroup$
    – achille hui
    Dec 6 '18 at 15:09












  • $begingroup$
    Yes, I'm writing an academic journal paper and some of these terms are out of my wheelhouse. I appreciate the recommendation of defining my term for the reader. I just want to make sure I'm not making up a name for it if a name already exists. Imagine dancing around the word "triangle", haha.
    $endgroup$
    – kreeser1
    Dec 6 '18 at 15:12
















$begingroup$
I don't think it has a known name. If you need one for something you are writing, make one up and tell your reader. "Angular section of an annulus" might do.
$endgroup$
– Ethan Bolker
Dec 6 '18 at 15:08




$begingroup$
I don't think it has a known name. If you need one for something you are writing, make one up and tell your reader. "Angular section of an annulus" might do.
$endgroup$
– Ethan Bolker
Dec 6 '18 at 15:08












$begingroup$
It isn't a complete annulus, but part of one?
$endgroup$
– DanielOnMSE
Dec 6 '18 at 15:08




$begingroup$
It isn't a complete annulus, but part of one?
$endgroup$
– DanielOnMSE
Dec 6 '18 at 15:08




2




2




$begingroup$
annulus sector? This is how the wiki entry of annulus call it.
$endgroup$
– achille hui
Dec 6 '18 at 15:09






$begingroup$
annulus sector? This is how the wiki entry of annulus call it.
$endgroup$
– achille hui
Dec 6 '18 at 15:09














$begingroup$
Yes, I'm writing an academic journal paper and some of these terms are out of my wheelhouse. I appreciate the recommendation of defining my term for the reader. I just want to make sure I'm not making up a name for it if a name already exists. Imagine dancing around the word "triangle", haha.
$endgroup$
– kreeser1
Dec 6 '18 at 15:12




$begingroup$
Yes, I'm writing an academic journal paper and some of these terms are out of my wheelhouse. I appreciate the recommendation of defining my term for the reader. I just want to make sure I'm not making up a name for it if a name already exists. Imagine dancing around the word "triangle", haha.
$endgroup$
– kreeser1
Dec 6 '18 at 15:12










4 Answers
4






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$begingroup$

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."






share|cite|improve this answer









$endgroup$





















    2












    $begingroup$

    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.






    share|cite|improve this answer









    $endgroup$





















      0












      $begingroup$

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






      share|cite|improve this answer









      $endgroup$





















        0












        $begingroup$

        The area between two concentric circles is called: an annulus.

        So you can call the blue part: a sector of an annulus.






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          4 Answers
          4






          active

          oldest

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          4 Answers
          4






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          2












          $begingroup$

          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."






          share|cite|improve this answer









          $endgroup$


















            2












            $begingroup$

            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."






            share|cite|improve this answer









            $endgroup$
















              2












              2








              2





              $begingroup$

              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."






              share|cite|improve this answer









              $endgroup$



              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."







              share|cite|improve this answer












              share|cite|improve this answer



              share|cite|improve this answer










              answered Dec 6 '18 at 15:08









              Alex SAlex S

              17.9k12160




              17.9k12160























                  2












                  $begingroup$

                  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.






                  share|cite|improve this answer









                  $endgroup$


















                    2












                    $begingroup$

                    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.






                    share|cite|improve this answer









                    $endgroup$
















                      2












                      2








                      2





                      $begingroup$

                      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.






                      share|cite|improve this answer









                      $endgroup$



                      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.







                      share|cite|improve this answer












                      share|cite|improve this answer



                      share|cite|improve this answer










                      answered Dec 6 '18 at 15:14









                      dbxdbx

                      1,602311




                      1,602311























                          0












                          $begingroup$

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






                          share|cite|improve this answer









                          $endgroup$


















                            0












                            $begingroup$

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






                            share|cite|improve this answer









                            $endgroup$
















                              0












                              0








                              0





                              $begingroup$

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






                              share|cite|improve this answer









                              $endgroup$



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







                              share|cite|improve this answer












                              share|cite|improve this answer



                              share|cite|improve this answer










                              answered Dec 6 '18 at 15:08









                              MoKo19MoKo19

                              1914




                              1914























                                  0












                                  $begingroup$

                                  The area between two concentric circles is called: an annulus.

                                  So you can call the blue part: a sector of an annulus.






                                  share|cite|improve this answer











                                  $endgroup$


















                                    0












                                    $begingroup$

                                    The area between two concentric circles is called: an annulus.

                                    So you can call the blue part: a sector of an annulus.






                                    share|cite|improve this answer











                                    $endgroup$
















                                      0












                                      0








                                      0





                                      $begingroup$

                                      The area between two concentric circles is called: an annulus.

                                      So you can call the blue part: a sector of an annulus.






                                      share|cite|improve this answer











                                      $endgroup$



                                      The area between two concentric circles is called: an annulus.

                                      So you can call the blue part: a sector of an annulus.







                                      share|cite|improve this answer














                                      share|cite|improve this answer



                                      share|cite|improve this answer








                                      edited Dec 7 '18 at 1:00

























                                      answered Dec 6 '18 at 15:08









                                      Elements in SpaceElements in Space

                                      1,16111127




                                      1,16111127






























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