Mock AIME 3 Pre 2005 Problems/Problem 1
Problem
Three circles are mutually externally tangent. Two of the circles have radii and . If the area of the triangle formed by connecting their centers is , then the area of the third circle is for some integer . Determine .
Solution
Let the radius of the third circle be . The side lengths of the triangle are , , and . From Heron's Formula, , or , or . , so . Thus the area of the circle is .
See Also
Mock AIME 1 Pre 2005 (Problems, Source) | ||
Preceded by First Question |
Followed by Problem 2 | |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 |