"The area of a circle is 124 cm square. find the area of the circle with the radius doubled" I can't seem to get this question or understand it
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area of the circle? On the circumference? Explain why your result makes sense.
If the radius of a circle is doubled, the area of the circle will be quadrupled and the circumference will also be doubled. This makes sense because the area of a circle is directly proportional to the square of the radius of the circle (if the radius of a circle is increased x times, its area will be increased to x^2 times the original area), whereas the circumference is proportional to the size of the radius (if the radius of a circle is increased x times, its circumference will increase x times).
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