diff --git a/doc/src/Eqs/pair_body_rounded.jpg b/doc/src/Eqs/pair_body_rounded.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..e7136ddd20c2acea0e89fa8412497333f15cb541
Binary files /dev/null and b/doc/src/Eqs/pair_body_rounded.jpg differ
diff --git a/doc/src/pair_body_rounded_polygon.txt b/doc/src/pair_body_rounded_polygon.txt
index e015dc76dfffdd574ec6bba4c73a2e000cb65883..d611e8ec98d50a249708f27abdf0ec3f79559c9a 100644
--- a/doc/src/pair_body_rounded_polygon.txt
+++ b/doc/src/pair_body_rounded_polygon.txt
@@ -58,10 +58,10 @@ surface from its center is not sqrt(2)/2, but (sqrt(2)+0.1)/2.  Thus
 the cutoff distance should be sqrt(2) + 0.1, since the surfaces of two
 particles that far apart could be touching.
 
-NOTE: Do we need a diagram of 2 overlapping polygon particles that
-explains how contact is defined?  Do we need an equation(s) that
-explain what the params in pair style and coeff mean, for damping and
-spring constants?  Or do we just want to reference the paper for that?
+The forces between vertex-vertex, vertex-edge, vertex-face and edge-edge
+are given by:
+
+:c,image(Eqs/pair_body_rounded.jpg)
 
 :c,image(JPG/pair_body_rounded.jpg)
 
diff --git a/doc/src/pair_body_rounded_polyhedron.txt b/doc/src/pair_body_rounded_polyhedron.txt
index 4c48b5c1bf3950db16d039cf38cbcc18b77021d4..52f6294d8512af30fabd22e03802a447f68a896d 100644
--- a/doc/src/pair_body_rounded_polyhedron.txt
+++ b/doc/src/pair_body_rounded_polyhedron.txt
@@ -59,10 +59,10 @@ surface from its center is not sqrt(3)/2, but (sqrt(3)+0.1)/2.  Thus
 the cutoff distance should be sqrt(3) + 0.1, since the surfaces of two
 particles that far apart could be touching.
 
-NOTE: Do we need a diagram of 2 overlapping polyhedron particles that
-explains how contact is defined?  Do we need an equation(s) that
-explain what the params in pair style and coeff mean, for damping and
-spring constants?  Or do we just want to reference the paper for that?
+The forces between vertex-vertex, vertex-edge, vertex-face, edge-edge
+and edge-face are given by:
+
+:c,image(Eqs/pair_body_rounded.jpg)
 
 :c,image(JPG/pair_body_rounded.jpg)