Measure the lengths of all the pieces of straight line or curves
around its outline, and add them all up.
You need to find the area of each two dimensional surface on the figure. Do you have a specific figure in mind?
You count the inside squares of the figure.
The remaining figure is the are of polygons that bounded by three dimensional figure .
Area of plane figure
The ratio
It is a figure that can be divided into rectangles and then find its mesure
They are near impossible to find. The figure was canceled before it started.
An L shaped figure is a plane figure and so will not have a volume.
It means you have found the distance around that figure.
By comparing the volume given to each figure.
a mirror
Six figure grid reference can be find by first measuring eastings and than northings.