Area is the quantity that expresses the extent of a two dimensional figure or shape, or planar lamina, in the plane. Surface area is itsog on the two dimensional surface of a three dimensional object..Example These shapes all have the same area of same area of . area paint. It helps to imagine how much paint would cover the shape..Area is the size of a surface! Learn more about Area, or try the Area Calculator. Triangle. Area = b h. b = base..Area definition is the surface included within a set of lines specifically the number of unit squares equal in measure to the surface. How to .Area meaning . a particular part of a place, piece of land, or country . a subject or activity, or a part of it . the size of a flat surface calculated by multiplying its . pi = pi = Area Formulas. Note “ab” means “a” multiplied by “b”. “a” means “a squared”, which is the same as “a” times “a”. Be careful!! Units count..The area of a circle is pi times the radius squared A = r . Learn how to use this formula to find the area of a .