Identify the shape: cylinder, cone, sphere, or circular segment
Use the correct formula for the shape
Cylinder: V = πr²h
Cone: V = (1/3)πr²h
Sphere: V = (4/3)πr³
Circular segment: V = area of circular base × height, if applicable
Measure the radius r
Measure the height h if needed
Substitute the values into the formula
Use π ≈ 3.14159 if needed
Calculate the result
Express the volume in cubic units