Fill in the blanks: 1. A straight line, y = const, above a distance in x is a 2. The area of a rectangle is the height multiplied by the. 3. The area of a ..is (1/2)(sum of the opposite faces) (height). 4. 5. The rectangles can be created in a numerous methods, inside the curve, outside the curve or by using a It actually doesn't make any variation how the rectangles are created since we are going to take the limit by having their width to 6. By means of a approach, and the knowledge that this outlines, or integral, over a particular range in x is the area under the curve, A is the limit of the sum as Dx leads to zero.