Update volume.py with volume of Icosahedron

maths/volume.py

@@ -469,6 +469,35 @@ def vol_torus(torus_radius: float, tube_radius: float) -> float:
     return 2 * pow(pi, 2) * torus_radius * pow(tube_radius, 2)
 
 
+def vol_icosahedron(tri_side: float) -> float:
+    """Calculate the Volume of an Icosahedron.
+    Wikipedia reference: https://en.wikipedia.org/wiki/Regular_icosahedron
+
+    >>> from math import isclose
+    >>> isclose(vol_icosahedron(2.5), 34.088984228514256)
+    True
+    >>> isclose(vol_icosahedron(10), 2181.694990624912374)
+    True
+    >>> isclose(vol_icosahedron(5), 272.711873828114047)
+    True
+    >>> isclose(vol_icosahedron(3.49), 92.740688412033628)
+    True
+    >>> vol_icosahedron(0)
+    0.0
+    >>> vol_icosahedron(-1)
+    Traceback (most recent call last):
+        ...
+    ValueError: vol_icosahedron() only accepts non-negative values
+    >>> vol_icosahedron(-0.2)
+    Traceback (most recent call last):
+        ...
+    ValueError: vol_icosahedron() only accepts non-negative values
+    """
+    if tri_side < 0:
+        raise ValueError("vol_icosahedron() only accepts non-negative values")
+    return tri_side**3 * (3 + 5**0.5) * 5 / 12
+
+
 def main():
     """Print the Results of Various Volume Calculations."""
     print("Volumes:")
@@ -489,6 +518,7 @@ def main():
     print(
         f"Hollow Circular Cylinder: {vol_hollow_circular_cylinder(1, 2, 3) = }"
     )  # ~= 28.3
+    print(f"Icosahedron: {vol_icosahedron(2.5) = }")  # ~=34.09
 
 
 if __name__ == "__main__":