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# Euclidean Geometry Triangles

They say triangles are the simplest polygon, but they're still not all that simple. Dive into this advanced treatment of triangles, and learn beautiful results from Euler's line to Routh's Theorem.

What is the area of a triangle with side lengths \(9,12,\) and \(15?\)

What is the area of a triangle with side lengths \(13, 14,\) and \(15?\)

What is the area of a triangle with side lengths \(9, 11,\) and \(10?\)

What is the area of a triangle with side lengths \(3,5,\) and \(7?\)

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