Problem

2025 AMC 12A Problem 14

Points F, G, and H are collinear with G between F and H. The ellipse with foci at G and H is internally tangent to the ellipse with foci at F and G, as shown below.

Problem 14 diagram

The two ellipses have the same eccentricity e, and the ratio of their areas is 2025. (Recall that the eccentricity of an ellipse is e = \dfrac{c}{a}, where c is the distance from the center to a focus, and 2a is the length of the major axis.) What is e?

\textbf{(A)} \dfrac{3}{5} \qquad \textbf{(B)} \dfrac{16}{25} \qquad \textbf{(C)} \dfrac{4}{5} \qquad \textbf{(D)} \dfrac{22}{23} \qquad \textbf{(E)} \dfrac{44}{45}


Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.


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