Triangular shawl is 100″ on one side and 57″ on other two sides. What is height? Pls respond with answer.?

I’m needing to decide if I’ll buy this in Ebay in less than an hour. Don’t have time to study plane geomerty. Too old anyway. Thanks for your help.

The height from the middle of the 100″ side to the apex formed by the two 57″ sides is √749 ≈ 27.367864″.
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For what it’s worth…
Your trianglular shawl is an isosceles triangle. A perpendicular bisector of the 100″ side would divide the triangle into 2 congruent right triangles that can be addressed in a variety of ways to determine the dimension you seek.

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