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How to find the terrain area of model statistics in the first lesson of mathematics in the second volume of the sixth grade?
Sector statistical chart area = radius x semi-longitude x3. 14x What percentage (or fraction)?
The part between point A and point B on the circle is simply called "arc" and is pronounced as "arc AB" or "arc AB". 2. The angle with the center of the circle as the center point is called the "central angle".