Each symbol (triangle, square, diamond and circle) in this table has a value. The total of these values in each row and column is written at the end of the corresponding row or column. Now write down the value of each symbol.
A circle has an area of A, A second circle has a diameter four times that of the first circle. What is the area of the second circle?
In the figure above, a square is inscribed in a circle with center O and a radius of 3. What is the perimeter of the square?
什么是QC小组(Quality Circle)?
Points X and Y are on a circle with center O, and point Z is on the longer arc of the circle between X and Y. If the measure of angle XOY is 135, the length of arc XZY is what fraction of the circumference of the circle?
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A great circle track provides the maximum saving in distance on().
The numeral in the center of a wind rose circle on a pilot chart indicates the ().
If a circle has an area of 49π, what is the diameter of the circle?
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The circle graphs below show the production numbers for certain Ford Mustangs in 1965 and 1971. Approximately how many more two-door hardtop coupes were made in 1971 than in 1965?
If the radius of a circle is increased by 40%, how much will the area increase?