Mathematics for IGCSE & O level - Mensuration (Section 7 - No. 23)
If you have a shape that isn't a standard shape, what's one way to calculate its area?
Guess the area.
Measure the perimeter.
Try to divide the shape into simpler shapes.
Use a very complex formula.
स्पष्टीकरण
Dividing complex shapes into simple shapes can make it easier to calculate.