1952 AHSME Problems/Problem 1
Contents
Problem
If the radius of a circle is a rational number, its area is given by a number which is:
Solution
Let the radius of the circle be the common fraction Then the area of the circle is Because is irrational and is rational, their product must be irrational. The answer is
Solution 2
The phrasing of the problem makes it clear that the rule would apply to all rational radii. So let r be equal to one. times 1 squared is equal to which is irrational. Therefore, the answer is
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See also
1952 AHSC (Problems • Answer Key • Resources) | ||
Preceded by First Question |
Followed by Problem 2 | |
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