diff --git a/maths/area.py b/maths/area.py
index b1b139cf4..abbf7aa85 100644
--- a/maths/area.py
+++ b/maths/area.py
@@ -7,9 +7,12 @@ from math import pi, sqrt
 def surface_area_cube(side_length: float) -> float:
     """
     Calculate the Surface Area of a Cube.
-
     >>> surface_area_cube(1)
     6
+    >>> surface_area_cube(1.6)
+    15.360000000000003
+    >>> surface_area_cube(0)
+    0
     >>> surface_area_cube(3)
     54
     >>> surface_area_cube(-1)
@@ -22,16 +25,46 @@ def surface_area_cube(side_length: float) -> float:
     return 6 * side_length**2
 
 
+def surface_area_cuboid(length: float, breadth: float, height: float) -> float:
+    """
+    Calculate the Surface Area of a Cuboid.
+    >>> surface_area_cuboid(1, 2, 3)
+    22
+    >>> surface_area_cuboid(0, 0, 0)
+    0
+    >>> surface_area_cuboid(1.6, 2.6, 3.6)
+    38.56
+    >>> surface_area_cuboid(-1, 2, 3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_cuboid() only accepts non-negative values
+    >>> surface_area_cuboid(1, -2, 3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_cuboid() only accepts non-negative values
+    >>> surface_area_cuboid(1, 2, -3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_cuboid() only accepts non-negative values
+    """
+    if length < 0 or breadth < 0 or height < 0:
+        raise ValueError("surface_area_cuboid() only accepts non-negative values")
+    return 2 * ((length * breadth) + (breadth * height) + (length * height))
+
+
 def surface_area_sphere(radius: float) -> float:
     """
     Calculate the Surface Area of a Sphere.
     Wikipedia reference: https://en.wikipedia.org/wiki/Sphere
     Formula: 4 * pi * r^2
-
     >>> surface_area_sphere(5)
     314.1592653589793
     >>> surface_area_sphere(1)
     12.566370614359172
+    >>> surface_area_sphere(1.6)
+    32.169908772759484
+    >>> surface_area_sphere(0)
+    0.0
     >>> surface_area_sphere(-1)
     Traceback (most recent call last):
         ...
@@ -46,7 +79,6 @@ def surface_area_hemisphere(radius: float) -> float:
     """
     Calculate the Surface Area of a Hemisphere.
     Formula: 3 * pi * r^2
-
     >>> surface_area_hemisphere(5)
     235.61944901923448
     >>> surface_area_hemisphere(1)
@@ -70,11 +102,14 @@ def surface_area_cone(radius: float, height: float) -> float:
     Calculate the Surface Area of a Cone.
     Wikipedia reference: https://en.wikipedia.org/wiki/Cone
     Formula: pi * r * (r + (h ** 2 + r ** 2) ** 0.5)
-
     >>> surface_area_cone(10, 24)
     1130.9733552923256
     >>> surface_area_cone(6, 8)
     301.59289474462014
+    >>> surface_area_cone(1.6, 2.6)
+    23.387862992395807
+    >>> surface_area_cone(0, 0)
+    0.0
     >>> surface_area_cone(-1, -2)
     Traceback (most recent call last):
         ...
@@ -93,14 +128,51 @@ def surface_area_cone(radius: float, height: float) -> float:
     return pi * radius * (radius + (height**2 + radius**2) ** 0.5)
 
 
+def surface_area_conical_frustum(
+    radius_1: float, radius_2: float, height: float
+) -> float:
+    """
+    Calculate the Surface Area of a Conical Frustum.
+    >>> surface_area_conical_frustum(1, 2, 3)
+    45.511728065337266
+    >>> surface_area_conical_frustum(4, 5, 6)
+    300.7913575056268
+    >>> surface_area_conical_frustum(0, 0, 0)
+    0.0
+    >>> surface_area_conical_frustum(1.6, 2.6, 3.6)
+    78.57907060751548
+    >>> surface_area_conical_frustum(-1, 2, 3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_conical_frustum() only accepts non-negative values
+    >>> surface_area_conical_frustum(1, -2, 3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_conical_frustum() only accepts non-negative values
+    >>> surface_area_conical_frustum(1, 2, -3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_conical_frustum() only accepts non-negative values
+    """
+    if radius_1 < 0 or radius_2 < 0 or height < 0:
+        raise ValueError(
+            "surface_area_conical_frustum() only accepts non-negative values"
+        )
+    slant_height = (height**2 + (radius_1 - radius_2) ** 2) ** 0.5
+    return pi * ((slant_height * (radius_1 + radius_2)) + radius_1**2 + radius_2**2)
+
+
 def surface_area_cylinder(radius: float, height: float) -> float:
     """
     Calculate the Surface Area of a Cylinder.
     Wikipedia reference: https://en.wikipedia.org/wiki/Cylinder
     Formula: 2 * pi * r * (h + r)
-
     >>> surface_area_cylinder(7, 10)
     747.6990515543707
+    >>> surface_area_cylinder(1.6, 2.6)
+    42.22300526424682
+    >>> surface_area_cylinder(0, 0)
+    0.0
     >>> surface_area_cylinder(6, 8)
     527.7875658030853
     >>> surface_area_cylinder(-1, -2)
@@ -124,9 +196,12 @@ def surface_area_cylinder(radius: float, height: float) -> float:
 def area_rectangle(length: float, width: float) -> float:
     """
     Calculate the area of a rectangle.
-
     >>> area_rectangle(10, 20)
     200
+    >>> area_rectangle(1.6, 2.6)
+    4.16
+    >>> area_rectangle(0, 0)
+    0
     >>> area_rectangle(-1, -2)
     Traceback (most recent call last):
         ...
@@ -148,9 +223,12 @@ def area_rectangle(length: float, width: float) -> float:
 def area_square(side_length: float) -> float:
     """
     Calculate the area of a square.
-
     >>> area_square(10)
     100
+    >>> area_square(0)
+    0
+    >>> area_square(1.6)
+    2.5600000000000005
     >>> area_square(-1)
     Traceback (most recent call last):
         ...
@@ -164,9 +242,12 @@ def area_square(side_length: float) -> float:
 def area_triangle(base: float, height: float) -> float:
     """
     Calculate the area of a triangle given the base and height.
-
     >>> area_triangle(10, 10)
     50.0
+    >>> area_triangle(1.6, 2.6)
+    2.08
+    >>> area_triangle(0, 0)
+    0.0
     >>> area_triangle(-1, -2)
     Traceback (most recent call last):
         ...
@@ -188,13 +269,15 @@ def area_triangle(base: float, height: float) -> float:
 def area_triangle_three_sides(side1: float, side2: float, side3: float) -> float:
     """
     Calculate area of triangle when the length of 3 sides are known.
-
     This function uses Heron's formula: https://en.wikipedia.org/wiki/Heron%27s_formula
-
     >>> area_triangle_three_sides(5, 12, 13)
     30.0
     >>> area_triangle_three_sides(10, 11, 12)
     51.521233486786784
+    >>> area_triangle_three_sides(0, 0, 0)
+    0.0
+    >>> area_triangle_three_sides(1.6, 2.6, 3.6)
+    1.8703742940919619
     >>> area_triangle_three_sides(-1, -2, -1)
     Traceback (most recent call last):
         ...
@@ -233,9 +316,12 @@ def area_triangle_three_sides(side1: float, side2: float, side3: float) -> float
 def area_parallelogram(base: float, height: float) -> float:
     """
     Calculate the area of a parallelogram.
-
     >>> area_parallelogram(10, 20)
     200
+    >>> area_parallelogram(1.6, 2.6)
+    4.16
+    >>> area_parallelogram(0, 0)
+    0
     >>> area_parallelogram(-1, -2)
     Traceback (most recent call last):
         ...
@@ -257,9 +343,12 @@ def area_parallelogram(base: float, height: float) -> float:
 def area_trapezium(base1: float, base2: float, height: float) -> float:
     """
     Calculate the area of a trapezium.
-
     >>> area_trapezium(10, 20, 30)
     450.0
+    >>> area_trapezium(1.6, 2.6, 3.6)
+    7.5600000000000005
+    >>> area_trapezium(0, 0, 0)
+    0.0
     >>> area_trapezium(-1, -2, -3)
     Traceback (most recent call last):
         ...
@@ -297,9 +386,12 @@ def area_trapezium(base1: float, base2: float, height: float) -> float:
 def area_circle(radius: float) -> float:
     """
     Calculate the area of a circle.
-
     >>> area_circle(20)
     1256.6370614359173
+    >>> area_circle(1.6)
+    8.042477193189871
+    >>> area_circle(0)
+    0.0
     >>> area_circle(-1)
     Traceback (most recent call last):
         ...
@@ -313,11 +405,14 @@ def area_circle(radius: float) -> float:
 def area_ellipse(radius_x: float, radius_y: float) -> float:
     """
     Calculate the area of a ellipse.
-
     >>> area_ellipse(10, 10)
     314.1592653589793
     >>> area_ellipse(10, 20)
     628.3185307179587
+    >>> area_ellipse(0, 0)
+    0.0
+    >>> area_ellipse(1.6, 2.6)
+    13.06902543893354
     >>> area_ellipse(-10, 20)
     Traceback (most recent call last):
         ...
@@ -339,9 +434,12 @@ def area_ellipse(radius_x: float, radius_y: float) -> float:
 def area_rhombus(diagonal_1: float, diagonal_2: float) -> float:
     """
     Calculate the area of a rhombus.
-
     >>> area_rhombus(10, 20)
     100.0
+    >>> area_rhombus(1.6, 2.6)
+    2.08
+    >>> area_rhombus(0, 0)
+    0.0
     >>> area_rhombus(-1, -2)
     Traceback (most recent call last):
         ...
@@ -374,9 +472,12 @@ if __name__ == "__main__":
     print(f"Rhombus: {area_rhombus(10, 20) = }")
     print(f"Trapezium: {area_trapezium(10, 20, 30) = }")
     print(f"Circle: {area_circle(20) = }")
+    print(f"Ellipse: {area_ellipse(10, 20) = }")
     print("\nSurface Areas of various geometric shapes: \n")
     print(f"Cube: {surface_area_cube(20) = }")
+    print(f"Cuboid: {surface_area_cuboid(10, 20, 30) = }")
     print(f"Sphere: {surface_area_sphere(20) = }")
     print(f"Hemisphere: {surface_area_hemisphere(20) = }")
     print(f"Cone: {surface_area_cone(10, 20) = }")
+    print(f"Conical Frustum: {surface_area_conical_frustum(10, 20, 30) = }")
     print(f"Cylinder: {surface_area_cylinder(10, 20) = }")