triple beam balance ,
You can use water displacement.
A balance is used to measure the mass of an irregularly shaped solid.
First, you need to get a graduated cylinder filled up with water and record the volume.Next, you put an irregularly object into a graduated cylinder fill with water. Then, you measure the volume of the graduated cylinder with the irregularly shaped object in it.Finally, you subtract the highest volume which was the volume of the graduated cylinder with the irregularly shaped object in it by the regular volume of the graduated cylinder which is the smallest volume and there's your answer.
you can divide it into triangles and add up all of the areas
You can use the water displacement method to measure the volume of an irregularly shaped solid. For a regularly shaped object you can do length x width x height.
Finding the center of gravity of an irregularly shaped object can be done using the plumb line method.
When an object is immersed in water the volume of water displaced is equal to the volume of that object as discovered by Archimedes.
Immerse the object completely in a liquid (e.g. water) and measure the volume of liquid displaced.
You can push it under water / under the liquid's surface, and measure the displacement of liquid.
The same as for a regular object: just divide the mass by the volume. You can measure the mass by immersing the object in a liquid; or you can calculate it by using integration.
Answer: You find the volume of an irregularly shaped object by water displacement. Answer: Another method is to use integration, which means that for purposes of calculation, the object is divided into lots of small pieces, for example, rectangular-shaped pieces.