What happens next?

How to find area
Find the lengths of two consecutive sides of the rectangle.
Because rectangles have two pairs of sides of equal length, label one side as the base (b) and one side as the height (h). Generally, the horizontal side is the base and the vertical side is the height.

pick from the following.
[A]. Multiply base times height to get the area. If the area of the rectangle is k, k = b * h.;
[B]. For example, look for a ruler that measures 90 degrees, as supermeasurements are calculated in this format. For example, angle the direction of the curved front side so the horizontal side measures 90 degrees.;
[C]. The distance from its base to its height refers to its height. With a ruler, draw two parallel rectangles across the paper.;
[D]. Widen the segments which the slats back in the rectangle have to be. For example, boards of an ft house will have 3 pieces of 16.;
[A].