Otro
How many rectangles are there?
Autor
Gadalla, Abraham
Resumen
Ensino Médio::Matemática Find a general formula involving m -number of columns- and n -number of rows- for the total number of rectangles. There is a second hint in the details, but do not look too quickly—thinking about the solution is more important than the answer. Note that a square is a special kind of rectangle, so count them too