diff --git a/src/__private__/__triangles_radial.scad b/src/__private__/__triangles_radial.scad
new file mode 100644
index 00000000..f6c0fdcd
--- /dev/null
+++ b/src/__private__/__triangles_radial.scad
@@ -0,0 +1 @@
+ function __triangles_radial(shape_pts) = [for(i = [1:len(shape_pts) - 2]) [0, i, i + 1]];
\ No newline at end of file
diff --git a/src/polysections.scad b/src/polysections.scad
index 262d9ed7..c8c43c15 100644
--- a/src/polysections.scad
+++ b/src/polysections.scad
@@ -11,6 +11,8 @@
 *
 **/
 
+include <__private__/__triangles_radial.scad>;
+
 module polysections(sections, triangles = "RADIAL") {
     module tri_sections(tri1, tri2) {
         polyhedron(
@@ -28,14 +30,9 @@ module polysections(sections, triangles = "RADIAL") {
         i == len(vector) ? [] :
         concat(vector[i], flat(vector, i + 1));    
     
-    leng_section = len(sections[0]);
-    
-    function radial_tris() = [
-        for(i = [1:leng_section - 2]) [0, i, i + 1]
-    ];
-        
     function hollow_tris() = 
         let(
+            leng_section = len(sections[0]),
             inner_i_begin = leng_section / 2,
             pair_idxes = [for(i = [0:inner_i_begin - 1])
                 let(n = inner_i_begin + i + 1)
@@ -48,7 +45,7 @@ module polysections(sections, triangles = "RADIAL") {
            
         ) flat(pair_idxes); 
 
-    function tris() = triangles == "RADIAL" ? radial_tris() : 
+    function tris() = triangles == "RADIAL" ? __triangles_radial(sections[0]) : 
         (triangles == "HOLLOW" ? hollow_tris() : triangles);
     
     module two_sections(section1, section2) {
diff --git a/src/shape_ellipse.scad b/src/shape_ellipse.scad
index 20f0fe5c..97c60ad9 100644
--- a/src/shape_ellipse.scad
+++ b/src/shape_ellipse.scad
@@ -13,6 +13,7 @@
 **/
 
 include <__private__/__frags.scad>;
+include <__private__/__triangles_radial.scad>;
 
 function shape_ellipse(axes) =
     let(
@@ -22,7 +23,7 @@ function shape_ellipse(axes) =
             for(a = [0:step_a:360 - step_a]) 
                 [axes[0] * cos(a), axes[1] * sin(a)]
         ],
-        triangles = [for(i = [1:len(shape_pts) - 2]) [0, i, i + 1]]
+        triangles = __triangles_radial(shape_pts)
     )
     [
         shape_pts,
diff --git a/src/shape_pie.scad b/src/shape_pie.scad
index 4876d473..a2922e33 100644
--- a/src/shape_pie.scad
+++ b/src/shape_pie.scad
@@ -13,6 +13,7 @@
 **/
 
 include <__private__/__frags.scad>;
+include <__private__/__triangles_radial.scad>;
 
 function shape_pie(radius, angles) =
     let(
@@ -32,7 +33,7 @@ function shape_pie(radius, angles) =
             ],
             [edge_r_end * [cos(angles[1]), sin(angles[1])]]
         ),
-        triangles = [for(i = [1:len(shape_pts) - 2]) [0, i, i + 1]]
+        triangles = __triangles_radial(shape_pts)
     )
     [
         shape_pts,
diff --git a/src/shape_square.scad b/src/shape_square.scad
index e40a183c..6b2a459c 100644
--- a/src/shape_square.scad
+++ b/src/shape_square.scad
@@ -14,6 +14,7 @@
 
 include <__private__/__is_vector.scad>;
 include <__private__/__frags.scad>;
+include <__private__/__triangles_radial.scad>;
 
 function shape_square(size, corner_r = 0) = 
     let(
@@ -37,7 +38,7 @@ function shape_square(size, corner_r = 0) =
             [[-half_w, -half_y], [half_w, -half_y]],
             [for(a = [270 + step_a:step_a:360 - step_a]) [corner_r * cos(a) + half_w, corner_r * sin(a) - half_h]]
         ),
-        triangles = [for(i = [1:len(shape_pts) - 2]) [0, i, i + 1]]
+        triangles = __triangles_radial(shape_pts)
     )
     [
        shape_pts,