【Haichuan Jokes Shop】Sorry, diploma not available
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Little Li’s grandmother has a circular water tank, and she asked me to measure its circumference so that she could make a lid for it. Xiao Li thought that the formula for the perimeter is 2πr; therefore, it was necessary to measure r, which meant finding the center of the circle. So he used two hangers, crossed them together, and used that to locate the center on the cylinder. Mom Li watched for a while and asked, “What are you doing?” ” “Measure the radius to calculate the circumference.” Can’t you just take a strand of yarn and wrap it around once? ”. Xiao Li felt sorry for all his graduation certificates……
That’s right; it’s written that way in the book
Using the formula from the book works just fine.:)
Practice leads to true knowledge; one should not read books mechanically.
Applying what you’ve learned to find the center is great