Let's Review
Definition: A particular extent of a two-dimensional surface
In order to find the area of a 2D shapes, we need to know the formulas. Below I have listed the different formulas for several shapes:
Square:
Area= a x a
where a= length of the side
Area= a x a
where a= length of the side
Rectangle:
Area= w x h
where w= width and h= height
Area= w x h
where w= width and h= height
Triangle:
Area= 1/2 x b x h
where b= base and h= vertical height
Trapezoid:
Area= 1/2(a+b) x h
where a= base 1 b= base 2 and h= vertical height
Area= 1/2(a+b) x h
where a= base 1 b= base 2 and h= vertical height
Circle:
Area= 3.14 x r x r
where r= radius of the circle