Base and Height
Half of base times height
Note: Problems 12.1–12.3 refer to the diagram below, rectangle ABCD in the coordinate plane with length 6 and width 4.
12.1 Calculate the area of the rectangle by counting the square units bounded by its sides.
The rectangle has a length of 6 and a width—or height—of 4, so it is comprised of four rows of six square units, each numbered individually in the following diagram. Thus, its area is 6 · 4 = 24 square units.
The area A of a rectangle with length l and width w is A = lw.
Note: Problems 12.1–12.3 ...