1296
Just google image checkerboard.
That depends on how big the rectangles are.
There are 2025 rectangles in a 9x9 grid.
There are 15 rectangles.
4
36
There are 32 black spaces on a checkerboard.
The checkerboard has sixty-four squares, an 8 by 8 board
There are 25 squares on a 5 by 5 checkerboard.
64
== ==
32.
64
What is the history of the checkerboard
64
64
A checkerboard is an 8×8 board and the 64 squares are of alternating dark and light color, often red and black.