International Research Journal of Education and Technology

This paper has two sections I and II. Section I exhibits rectangles, where, in each rectangle, twice the area added with its semi-perimeter is represented  by a Gopa number of first kind. Section II exhibits rectangles, where, in each rectangle, twice the area minus its semi-perimeter is represented  by a Gopa number  of first kind. The total number of primitive and non-primitive rectangles is also given.

Keywords:

 Rectangles, Gopa number of first kind,  Primitive rectangles, Non-Primitive rectangles.