In Lesson 20 it was stated that the area (A) of a rectangle is related to the

length (l ) and width (w) of the rectangle by this formula:

A = lw

This formula means “the area of a rectangle equals the product of its length

and width.” If we are given measures for l and w, we can replace the letters in

the formula with numbers and calculate the area.

Distributive Property

​we distribute, or “spread,” the multiplication over the terms that are being added (or subtracted) within the parentheses.

​Practice Set

​Daily Challenge #41

​a.

​b. Find A in A = L x W when L is 12 and W is 3.