Acronym	dedip (old: dadip)
Name	decagon-decagon duoprism
	©
Circumradius	sqrt[3+sqrt(5)] = 2.288246
Volume	25 [5+2 sqrt(5)]/4 = 59.200850
General of army	(is itself convex)
Colonel of regiment	(is itself locally convex)
Dihedral angles	at {10} between dip and dip:   144° at {4} between dip and dip:   90°
Face vector	100, 200, 120, 20
Confer	general duoprisms: 10,n-dip   n,n-dip   n,m-dip   2n,m-dip   2n,2m-dip   compounds: sadtap   general polytopal classes: noble polytopes
External links

Incidence matrix according to Dynkin symbol

x10o x10o

.  . .  . | 100 |   2   2 |  1   4  1 |  2  2
----------+-----+---------+-----------+------
x  . .  . |   2 | 100   * |  1   2  0 |  2  1
.  . x  . |   2 |   * 100 |  0   2  1 |  1  2
----------+-----+---------+-----------+------
x10o .  . |  10 |  10   0 | 10   *  * |  2  0
x  . x  . |   4 |   2   2 |  * 100  * |  1  1
.  . x10o |  10 |   0  10 |  *   * 10 |  0  2
----------+-----+---------+-----------+------
x10o x  . ♦  20 |  20  10 |  2  10  0 | 10  *
x  . x10o ♦  20 |  10  20 |  0  10  2 |  * 10

or
.  . .  .    | 100 |   4 |  2   4 |  4
-------------+-----+-----+--------+---
x  . .  .  & |   2 | 200 |  1   2 |  3
-------------+-----+-----+--------+---
x10o .  .  & |  10 |  10 | 20   * |  2
x  . x  .    |   4 |   4 |  * 100 |  2
-------------+-----+-----+--------+---
x10o x  .  & ♦  20 |  30 |  2  10 | 20

x10o x10/9o

.  . .    . | 100 |   2   2 |  1   4  1 |  2  2
------------+-----+---------+-----------+------
x  . .    . |   2 | 100   * |  1   2  0 |  2  1
.  . x    . |   2 |   * 100 |  0   2  1 |  1  2
------------+-----+---------+-----------+------
x10o .    . |  10 |  10   0 | 10   *  * |  2  0
x  . x    . |   4 |   2   2 |  * 100  * |  1  1
.  . x10/9o |  10 |   0  10 |  *   * 10 |  0  2
------------+-----+---------+-----------+------
x10o x    . ♦  20 |  20  10 |  2  10  0 | 10  *
x  . x10/9o ♦  20 |  10  20 |  0  10  2 |  * 10

x10/9o x10/9o

.    . .    . | 100 |   2   2 |  1   4  1 |  2  2
--------------+-----+---------+-----------+------
x    . .    . |   2 | 100   * |  1   2  0 |  2  1
.    . x    . |   2 |   * 100 |  0   2  1 |  1  2
--------------+-----+---------+-----------+------
x10/9o .    . |  10 |  10   0 | 10   *  * |  2  0
x    . x    . |   4 |   2   2 |  * 100  * |  1  1
.    . x10/9o |  10 |   0  10 |  *   * 10 |  0  2
--------------+-----+---------+-----------+------
x10/9o x    . ♦  20 |  20  10 |  2  10  0 | 10  *
x    . x10/9o ♦  20 |  10  20 |  0  10  2 |  * 10

or
.    . .    .    | 100 |   4 |  2   4 |  4
-----------------+-----+-----+--------+---
x    . .    .  & |   2 | 200 |  1   2 |  3
-----------------+-----+-----+--------+---
x10/9o .    .  & |  10 |  10 | 20   * |  2
x    . x    .    |   4 |   4 |  * 100 |  2
-----------------+-----+-----+--------+---
x10/9o x    .  & ♦  20 |  30 |  2  10 | 20

x5x x10o

. . .  . | 100 |  1  1   2 |  1  2  2  1 |  2 1 1
---------+-----+-----------+-------------+-------
x . .  . |   2 | 50  *   * |  1  2  0  0 |  2 1 0
. x .  . |   2 |  * 50   * |  1  0  2  0 |  2 0 1
. . x  . |   2 |  *  * 100 |  0  1  1  1 |  1 1 1
---------+-----+-----------+-------------+-------
x5x .  . |  10 |  5  5   0 | 10  *  *  * |  2 0 0
x . x  . |   4 |  2  0   2 |  * 50  *  * |  1 1 0
. x x  . |   4 |  0  2   2 |  *  * 50  * |  1 0 1
. . x10o |  10 |  0  0  10 |  *  *  * 10 |  0 1 1
---------+-----+-----------+-------------+-------
x5x x  . ♦  20 | 10 10  10 |  2  5  5  0 | 10 * *
x . x10o ♦  20 | 10  0  20 |  0 10  0  2 |  * 5 *
. x x10o ♦  20 |  0 10  20 |  0  0 10  2 |  * * 5

x5x x10/9o

. . .    . | 100 |  1  1   2 |  1  2  2  1 |  2 1 1
-----------+-----+-----------+-------------+-------
x . .    . |   2 | 50  *   * |  1  2  0  0 |  2 1 0
. x .    . |   2 |  * 50   * |  1  0  2  0 |  2 0 1
. . x    . |   2 |  *  * 100 |  0  1  1  1 |  1 1 1
-----------+-----+-----------+-------------+-------
x5x .    . |  10 |  5  5   0 | 10  *  *  * |  2 0 0
x . x    . |   4 |  2  0   2 |  * 50  *  * |  1 1 0
. x x    . |   4 |  0  2   2 |  *  * 50  * |  1 0 1
. . x10/9o |  10 |  0  0  10 |  *  *  * 10 |  0 1 1
-----------+-----+-----------+-------------+-------
x5x x    . ♦  20 | 10 10  10 |  2  5  5  0 | 10 * *
x . x10/9o ♦  20 | 10  0  20 |  0 10  0  2 |  * 5 *
. x x10/9o ♦  20 |  0 10  20 |  0  0 10  2 |  * * 5

x5x x5x

. . . . | 100 |  1  1  1  1 |  1  1  1  1  1  1 | 1 1 1 1
--------+-----+-------------+-------------------+--------
x . . . |   2 | 50  *  *  * |  1  1  1  0  0  0 | 1 1 1 0
. x . . |   2 |  * 50  *  * |  1  0  0  1  1  0 | 1 1 0 1
. . x . |   2 |  *  * 50  * |  0  1  0  1  0  1 | 1 0 1 1
. . . x |   2 |  *  *  * 50 |  0  0  1  0  1  1 | 0 1 1 1
--------+-----+-------------+-------------------+--------
x5x . . |  10 |  5  5  0  0 | 10  *  *  *  *  * | 1 1 0 0
x . x . |   4 |  2  0  2  0 |  * 25  *  *  *  * | 1 0 1 0
x . . x |   4 |  2  0  0  2 |  *  * 25  *  *  * | 0 1 1 0
. x x . |   4 |  0  2  2  0 |  *  *  * 25  *  * | 1 0 0 1
. x . x |   4 |  0  2  0  2 |  *  *  *  * 25  * | 0 1 0 1
. . x5x |  10 |  0  0  5  5 |  *  *  *  *  * 10 | 0 0 1 1
--------+-----+-------------+-------------------+--------
x5x x . ♦  20 | 10 10 10  0 |  2  5  0  5  0  0 | 5 * * *
x5x . x ♦  20 | 10 10  0 10 |  2  0  5  0  5  0 | * 5 * *
x . x5x ♦  20 | 10  0 10 10 |  0  5  5  0  0  2 | * * 5 *
. x x5x ♦  20 |  0 10 10 10 |  0  0  0  5  5  2 | * * * 5

snubbed forms: s5s2s5s