Online Geometry Problems

Online Geometry Problem 772: Similar triangles with a Common Vertex, Equal Angles, Midpoints, Metric relations. Level: High School, College, Mathematics Education

The figure below shows triangles ABC and AB'C' with the common vertex A, angle BAC = angle B'AC', and angle ABC=AB'C'. Points D, E, F are the midpoints of BC, B'C, and BC', respectively. If AB = 5, AC = 6, and DE = 4, find DF.

Geometry problem: Similar triangles, Midpoints, Common vertex


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