Circle has a radius of and circle has a radius of . The area of circle is how many times the area of circle ?
Enter a number or fraction, e.g. 5, 0.5, 1/2
Explanation
Answer: 2209
Explanation:1. Recall the formula for the area of a circle: Area , where r is the radius.
-
Calculate the area of circle A (): Radius of circle A, . .
-
Calculate the area of circle B (): Radius of circle B, . .
-
Calculate : . . So, .
-
Find how many times the area of circle B is the area of circle A: This means we need to calculate the ratio .
-
Simplify the ratio: The terms cancel out (assuming , which is implicit for a radius). Ratio =
Perform the division: : So, . Ratio = .
- Alternative way to find the ratio of areas: The ratio of the areas of two similar figures (circles are always similar) is the square of the ratio of their corresponding linear dimensions (radii in this case). Ratio of radii = . Ratio of areas = .
Calculate : .
- Conclusion: The area of circle B is times the area of circle A.