Traditional Culture Encyclopedia - The 24 Solar Terms - On Children's Day, the school will set up a square auditorium with a side length of 20 meters with balloons, and hang balloons every other meter.
On Children's Day, the school will set up a square auditorium with a side length of 20 meters with balloons, and hang balloons every other meter.
For a square with a side of 20 meters, a balloon should be hung every other meter, and balloons should be hung at all four corners.
20 is a multiple of 1, just enough to hang the ball evenly.
It is equivalent to pulling the circumference into a straight line without hanging one end.
Hang 4×20÷ 1=80 balloons.
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