I am not sure but I think it is some thing multiplied by 2(base area of the prism)
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The formula for calculating the volume of an octagonal prism is V = A * h, where A is the area of the base (octagon) and h is the height of the prism. The area of the base can be calculated using the formula for the area of a regular octagon: A = 2(1 + √2) * s^2, where s is the side length of the octagon.
If a rectangular prism and a triangular prism have the same length, width, and height, then their volumes are equal. This is because although the shapes are different, they both occupy the same amount of space if their dimensions are the same. The formula for calculating volume is length x width x height for both shapes, resulting in equal volumes.
To find the volume of a prism, multiply the area of the base by the height of the prism. The volume is typically expressed in cubic units. So, if the prism is in inches, the volume would be in cubic inches.
V=Area of the base*Height. The base is one of the two congruent faces of a prism. For example, in the picture attached, the base would be the five-sided face (pentagon) in a, and the triangle in b. The height would be the measurement of any of (they're all the same) the remaining sides that are not a part of the bases.
Volume of a Cube Length x Breadth x Height Volume of a Triangular Prism (Length x Breadth x Height) divided by 2 Volume of a Square Pyramid (Length x Breadth x Height) divided by 3 Volume of a Cylinder (Pi x Radius x Radius x Length) Volume of a Cone (Pi x Radius x Radius x Height) divided by 3 Volume of a Sphere (Pi x Radius x Radius x Radius x 4) divided by 3 -----=-----=-----=-----=-----=-----=-----=-----=-----=-----=-----= By Austin From Covenant Christian School