a irregular figure is not a particular shape it may have two or more figures in to make a irregular figure
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Any irregular polygon does not have equal sides and equal interior angles
Area. Very few 2-dimensional figures can be measured by length and width - rectangles (and stretching the terminology) triangles and parallelograms. Certainly not circles, stars, irregular polygons, other irregular shapes.
water displacement
You get the Volume by using formulas. There is usually a specific formula to find the volume of each shape. Some irregular shapes may not have a formula.
an irregular figure is when it is open or have curved lines.
You get the area by using formulas. There is usually a specific formula to find the area of each shape. Some irregular shaps may not have a formula.
There is no such formula. To determine the area of an irregular plane shape split it into known shapes such as rectangles, triangles, segments of a circle etc. Determine the area(s) of each of these and sum the results to find the total area.
by subtracting
a irregular figure is not a particular shape it may have two or more figures in to make a irregular figure
There is no formula. That's why it's called irregular!
It depends on what kind of irregular shape you are talking about and the characteristics you want a formula for.
There is no general formula for all irregular polygons.
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You approximate your irregular figure lots of small figures of known shapes. For example, you can divide it into lots of thin vertical (or horizontal) stripes, each of which is approximately a rectangle.