Understanding the perimeter and area of quadrilaterals is important for many reasons:

1. Practical Uses:

   • You need to plan spaces for things like buildings and gardens.
   • You have to figure out how much material, like paint or flooring, you will need.

2. Math Basics:

   • To find the perimeter ($P$) of a rectangle, you use this formula: $P = 2(a + b)$.
   • To find the area ($A$) of a rectangle, the formula is: $A = a \times b$.

3. Everyday Examples:

   • Most buildings are quadrilaterals, making up about 90% of all structures.
   • Knowing the area helps us save resources and use them wisely.