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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.
By comparing the volume given to each figure.
It means you have found the distance around that figure.
a mirror
Six figure grid reference can be find by first measuring eastings and than northings.