Biscribed Chiral Solids

(box: x-ray)  (F: faces)  (slider: perspective)  (image: L=rotate R=zoom)  (M: metrics)

Biscribed Pentagonal Icositetrahedron (dextro)
biscribed form
Vertices:  38  (32[3] + 6[4])
Faces:24  (irregular pentagons)
Edges:60  (12 short + 24 medium + 24 long)
Symmetry:  Chiral Octahedral  (O)
Short Edge Angle:  acos(−(99−74*sqrt(3)    
    +sqrt(3*(6487+3764*sqrt(3))))/282)    
≈126.657193242 degrees
Medium Edge Angle:  acos(−(35*sqrt(3)−50    
    +sqrt(3*(241+400*sqrt(3))))/94)    
≈132.537319853 degrees
Long Edge Angle:  acos(−(35*sqrt(3)    
    −3+sqrt(3*(241+400*sqrt(3))))/141)    
≈141.632610391 degrees
Dual Solid:  Biscribed Snub Cube (laevo)
(values below based on circumscribed radius = 1)
Short Edge (12):  sqrt(3*(11−4*sqrt(3)−sqrt(1+8*sqrt(3))))/3    ≈0.26919376455618979793
Medium Edge (24):  sqrt(3*(5*sqrt(3)−3    
    −sqrt(6*(15*sqrt(3)−22))))/3    
≈0.50763159299964177698
Long Edge (24):  sqrt(3*(15−5*sqrt(3)    
    −sqrt(6*(15*sqrt(3)−22))))/3    
≈0.69583557132062191899
Circumscribed Radius:  1
Inscribed Radius:  1/sqrt(7+5*sqrt(3)−sqrt(103+60*sqrt(3)))    ≈0.88546420708543487113
Volume:2*(15*sqrt(3)−22+sqrt(52*sqrt(3)−89))/3    ≈3.3423638184311954732