The figure below shows a rectangle with sides a and b.
Express the perimeter of the given rectangle using the variables a and b.
Express the area of the given rectangle using the variables a and b.
Calculate the perimeter of the rectangle if you measure the sides 
and 
.
Calculate the area of the rectangle if the sides measure 
and .
is obtained as: 
is obtained as: 
and 
, then the perimeter of the rectangle is 
.
, then the area of the rectangle is 
.
