Page 97 - Primary Five Science

Regular shaped objects

A regular object has sides which form standard polygons, such

as square, rectangle, trapezoid, parallelogram, triangle, penta-

gon, hexagon, etc...
.
We find the volume of regular objects by multiplying the base

area of the object by its height.

E.g. Volume of a cube, cuboid = L x W x H

Irregular shaped objects

Irregular objects are those whose sides do not form standard

polygons e.g. stones, keys, needles, shoes, sweet potato tuber,

cassava tuber etc.
The volume of irregular shaped objects is measured by using

the displacement method.
We can not use this method for objects that float without dis-

placing any liquid.