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how do we find out the size of the markings of the inner square on the backboard
The backboard of a basketball goal is typically 1.80 meters by 1.05 meters in area. The diameter of the rim of the basket is 0.45 meters.
Depends on the size of the board.
A NBA regulation backboard is 72" wide x 42" high
Each square is 1.5 in by 1.5 in
So a size 7 basketball is a men's size basketball. A size 6 basketball is a woman's size basketball. That means a size 5 is for people who have smaller hands. That's how you compare sizes.
The outside measurement of the painted square on a regulation Size Basketball goal is 24"wide by 18" tall
I'm assuming we are talking about the back board which has a standard size of 6 feet wide, 3 1/2 feet tall, and 1/2 inch thick.
A Size 7 basketball is usually 29.5 incheshttp://www.hrsinformer.com/2009/10/how-to-choose-a-basketball/
The Official Basketball Hoop size is 21 inches