Most of us use formulas to determine the area of common polygons, such as triangles and rectangles. The formula for the area of a rectangle is A = l • w, where l represents the length of the rectangle and w represents the width.

The formula, for the area of a triangle is where b represents the length of the base of the triangle and h represents the height of the triangle. (Height is the length of the segment from a vertex perpendicular to the opposite side.)

Next > Part B (Continued): The Triangle Formula