Question: what is the formula to find the volume of a semicircle?
Answer: The formula for the volume of a semicircle is:
V = ½•π•r²•h.
Volume of a uniformed shaped object such as an octagon column is derived by the following formula:
Volume = Area • Height.
The formula above uses the area of a semi-circle.
For the volume of polygon based objects (columns), see the following: