Area of Planar Regions
Below we can see different types of planar figure:
Often, a planar figure can be made up of two or more simpler planar regions. The area of a composite figure equals the sum of the areas of its parts. We can write this as:
Area of figure = Ar.(A) + Ar.(B) + Ar.(C)
Keeping this in mind, we can express the following areas as:
Area = Ar. of
Area = Ar. of
Area = Ar. of
(a) Congruent Figures
When two figures are congruent (exactly the same shape and size), their areas are
(b) Sum of Parts
The area of any figure equals the